RARE VASCULAR PLANTS IN THE
NORTHWEST TERRITORIES

Cheryl L. McJannet, George W. Argus, and William J. Cody

of Nature

© — NO. 73
canadien Soa . Z

de la nature

À cc OES “<s SYLLOGEUS

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Syllogeus is a publication of the Canadian Museum of Nature, designed to permit the rapid dissemination of information pertaining to those
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quickly, normal publishing procedures have been abbreviated.

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Previous titles in the Canadian Rare Plants Project /Titres précédents dans le ene des plantes rares du Canada x

Argus, George W. and/et David J. White (1977), Syllogeus 14
THE‘RARE VASCULAR PLANTS OF ONTARIO / LES PLANTES VASCULAIRES RARES DE L'ONTARIO

Argus, George W. and/et David J. White (1978), Syllogeus 17
THE RARE VASCULAR PLANTS OF ALBERTA / LES PLANTES VASCULAIRES RARES DE hae nl

Maher, Robert V. David J. White, George W. Argus, and/et Paul A. Keddy (1978), Syllogeus 18
THE RARE VASCULAR PLANTS OF NOVA SCOTIA / LES PLANTES VASCULAIRES RARES DE LA NOUVELLE-ECOSSE

Maher, Robert V. George W. Argus, Vernon L. Harms, and/et John H. Hudson (1979), Syllogeus 20
THE RARE VASCULAR PLANTS OF SASKATCHEWAN / LES PLANTES VASCULAIRES RARES DE LA SASKATCHEWAN

White, David J. and/et Karen Johnson (1980), Syllogeus 27
THE RARE VASCULAR PLANTS OF MANITOBA/ LES PLANTES VASCULAIRES RARES DU MANITOBA

Douglas, George W., George W. Argus, H. Loney Dickson and Daniel F. Brunton (1981), Sy 28
THE RARE VASCULAR PLANTS OF THE YUKON / LE PLANTES VASCULAIRES RARES DU YUKON

Argus, G.W., K.M. Pryer, D.J. White and/et C.J. Keddy (eds). 1982-1987. ATLAS OF THE RARE VASCULAR PLANTS OF ONTARIO /
ATLAS DES PLANTES VASCULAIRES RARES DE L'ONTARIO. 4 Parts /4 parties: National Museum of Natural Sciences / Musée
national des sciences naturelles, Ottawa.

Bouchard, André, Denis Barabé, Madeleine Dumais and/et Stuart Hay (1983), Syllogeus 48
THE RARE VASCULAR PLANTS OF QUEBEC / LES PLANTES VASCULAIRES RARES DU QUEBEC

Hinds, Harold R. (1983), Syllogeus 50
“THE RARE VASCULAR PLANTS OF NEW BRUNSWICK / LES PLANTES VASCULAIRES RARES DU NOUVEAU
BRUNSWICK

Straley, Gerald B., Roy L. Taylor and/et George W. Douglas (1985), Syllogeus 59
THE RARE VASCULAR PLANTS OF BRITISH COLUMBIA / LES PLANTES VASCULAIRES RARES DU COLOMBIE-
BRITANNIQUE :

_ Argus, G.W. and/et K.M. Pryer. 1990. RARE VASCULAR PLANTS IN CANADA: OUR NATURAL HERITAGE / LES PLANTES
VASCULAIRES RARES DU CANADA: NOTRE PATRIMOINE NATUREL. Canadian Museum of Nature / Musée canadien de la
nature, Ottawa.

Bouchard, André, Stuart Hay, Luc Brouillet, Martin Jean and/et Isabelle Saucier (1991), Syllogeus 65
THE RARE VASCULAR PLANTS OF THE ISLAND OF NEWFOUNDLAND / LES PLANTES VASCULAIRES RARES DE L'ILE
DE TERRE-NEUVE

Day, Robin and Paul M. Catling (1991), Syllogeus 67
THE RARE VASCULAR PLANTS OF PRINCE EDWARD ISLAND

McJannet, Cheryl, George Argus, Sylvia Edlund and Jacques Cayouette (1993), Syllogeus 72
RARE VASCULAR PLANTS IN THE CANADIAN ARCTIC

McJannet, Cheryl, George Argus, and William J. Cody (1995), Syllogeus 73
RARE VASCULAR PLANTS IN THE NORTHWEST TERRITORIES

RARE VASCULAR PLANTS IN THE NORTHWEST TERRITORIES

Cheryl L. McJannet, George W. Argus

Research Division
Canadian Museum of Nature
P.O. Box 3443, Station D
Ottawa, Ontario, Canada
K1P 6P4

and
William J. Cody

Agriculture Canada
Centre for Land and Biological
Resources Research
William Saunders Bldg., C.E.F.
Ottawa, Ontario, Canada
K1A 0C6

Syllogeus No. 73

1995

© 1995 Canadian Museum of Nature
Published by the:

Canadian Museum of Nature
Ottawa, Canada K1P 6P4

Catalogue No. NM95-20/73E

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Syllogeus Series No. 73
Printed in Canada
ISBN 0-660-13072-6

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including any storage or retrieval system, or by any means,
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Publié par le :

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Ottawa, Canada K1P 6P4

Catalogue No. NM95-20/73E

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adressées au :

Musée canadien de la nature
Section des commandes postales
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Serie Syllogeus No. 73
Imprimé au Canada
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Cover photograph taken by A.L. Rand, MacMillan Pass, Northwest Territories

© Canadian Museum of Nature, Negative No. 94611

TABLE OF CONTENTS

1 Introduction

2 Definitions

3 Criteria

4 Methods

5 Format of the List

1 The Distribution Patterns of Rare Plants in the Northwest Territories
10 The Fret of Rare Plants in the Northwest Territories

15 List of the Rare Vascular Plants in the Northwest Territories

85 References

89 Appendices
89 I: Family List of Rare Vascular Plants of the Northwest Territories
93 Il: Phytogeographical List of Rare Vascular Plants of the Northwest Territories

97 III: List of Excluded Candidate Rare Taxa

ABSTRACT / RESUME

The flora of the Northwest Territories has approximately 1130 vascular plants (Porsild
1964, Porsild & Cody 1980), of which we have designated 206 taxa as rare. These plants
represent a unique part of Canadian biodiversity. The recognition of these taxa is an important
step toward the recognition and conservation of ecosystems in the Northwest Territories. Most
of the rare taxa in this list have boreal, montane, prairie, or arctic-alpine affinities and occur in
the Northwest Territories as peripheral taxa. Other rare taxa have arctic, coastal, cosmopolitan,
or aquatic affinities. There is a small, but important number of taxa (18) that are endemic to
the Northwest Territories.

This publication is divided into three sections, the first includes: an introduction, a
definition of terms, methods, criteria for assessing rare status, an interpretation of distributional
patterns, a summary on the protection of plants in the Northwest Territories, and a listing of
future research requirements. The second section is a list of the rare plants and for each taxon
we include: documentation supporting its rarity, phytogeography, rare status in other provinces
and regions of Canada, the Nature Conservancy Global and Canada Ranks, habitat, relevant
comments, and a map illustrating its distribution in the Northwest Territories. The third and
final section includes the following three appendices: a listing by family (Appendix 1), a
phytogeographical list (Appendix IT), and a list of excluded taxa with reasons for their exclusion
(Appendix III).

La flore des Territoires du Nord-Ouest s’élève à quelque 1,130 plantes vasculaires
(Porsild 1964, Porsild & Cody 1980) parmi lesquelles 206 taxons ont reçu la désignation de
plantes rares. Ces végétaux représentent une composante unique de la biodiversité à l’échelle
canadienne. La reconnaissance de ces taxons est une étape importante dans la caractérisation
et la conservation des écosystèmes des Territoires du Nord-Ouest. La majorité des taxons rares
énumérés dans cette liste montre des affinités avec des espèces boréales, alpines, prairiales or
arctiques-alpines et se retrouve dans les Territoires du Nord-Ouest à la limite de leur répartition
géographique. D’autres taxons rares ont plutôt des affinités avec des espèces arctiques, côtières,
cosmopolites ou aquatiques. Un petit nombre significativement important de taxons (18) sont
endémiques aux Territoires du Nord-Ouest.

Cette publication est divisée en trois sections dont la première qui regroupe
introduction, la définition des termes, les méthodes, les critères permettant la définition de la
rareté, l’interprétation des aires de répartition, le sommaire sur la protection des plantes dans
les Territoires du Nord-Ouest est la direction à donner à de futurs projets de recherche. La
seconde partie contient la list des plantes rares à laquelle s’ajoutent pour chacun des taxons la
documentation confirmant le statut de rareté, la répartition phytogéographique, le niveau de
rareté dans les autres provinces et régions du Canada, les niveaux de rareté mondial et canadien
obtenus auprès de l’organisme Nature Conservancy, l’habitat, les commentaires pertinents ainsi
qu'une carte illustrant la répartition de l’espèce dans les Territoires du Nord-Ouest. Finalement
la dernière section contient les trois appendices siuvants: une liste par familles (Appendice 1),
une liste phytogéographique (Appendice 2) et une liste des taxons exclus avec les raisons qui ont
motivé ces exclusions (Appendice 3).

INTRODUCTION

The biodiversity of plant and animal
life is of increasing concern to Canadians.
The lack of protection for rare species and
their habitats is not only detrimental to plant
populations themselves, but may forewarn of
harmful environmental changes that could
have serious human consequences. The
occurrence of rare plants often reflects
unique habitats or important evolutionary
situations such as refugia or centres of
evolution (Argus & McNeill 1975). Also,
rare plants often have genetic characteristics
worth preserving because of their
contribution to global biodiversity.

Rare plants are an important aspect
of Canadian biodiversity. There are many
regions in Canada where rare plants have
little or no effective protection. If plants
and habitats are to be given legislative
protection, it is essential to have well-
documented lists of candidate plants. It is
the purpose of this list to provide such
documentation for the Northwest Territories.

In 1973, the Systematics and
Phytogeography Section of the Canadian
Botanical Association formed the Rare and
Endangered Plants Committee. The goal of
this committee was to make an inventory of
the rare and endangered vascular flora of
Canada. Since 1975, as part of this effort,
the Research Division’s Canadian Rare
Plants Project, has been involved in
compiling rare plant lists for the Canadian
provinces and territories.

Some plants that were once part of
the Canadian flora have become extinct or
have been extirpated during the past 75
years (Argus & Pryer 1990). As well,
certain habitats that were once widespread
have been so extensively modified, that the
continued existence of some taxa are
threatened. While it has been suggested that
endangered plants can be protected by:
transplantation, growing them in botanical
gardens, or by cryogenic seed storage, this
is rarely sufficient to ensure the long-term
survival of these taxa. For the long-term
conservation of flora it is necessary to
preserve natural areas sufficiently large to
protect the habitats of typical, as well as,
unique plants. Rare plants by definition are
very ‘susceptible ‘to. ‘the effects of
environmental change, which are often
caused or exacerbated by human activities.
Compared to other parts of Canada, the
Northwest Territories is not significantly
affected by human activities. However, the
landscape and flora are particularly sensitive
to destructive human activities due to the
rigorous climate and widespread presence of
permafrost. This inventory of the rare flora
of the Northwest Territories may aid in
recognizing taxa requiring protection, but,
more importantly, it may be used to
recognize habitats and ecosystems that
require conservation. A comprehensive
system of ecosystem reserves is essential to
ensure that the rare flora of the Northwest
Territories does not become endangered.

DEFINITIONS

A rare species is one that because of
its biological characteristics, or because it
occurs at the edge of its main range, or, for
some other reason, exists in low numbers or
in very restricted areas in the region under
consideration. The taxon may be restricted
to a small geographical area, but be locally
common (eg. Artemisia alaskana) or it may
occur sparsely over a wide area (eg.
Limosella aquatica). For the Northwest
Territories, we have considered "a small
geographical area," to be an area
approximately the size of Nahanni National
Park (4766 km?). Our definition of a rare
taxon is essentially the one given by the
International Union for Conservation of
Nature and Natural Resources (IUCN)
(Lucas & Synge 1978) for a taxon’s total
world population.

The selection of taxa as rare in a
region as large and as poorly botanized as
the Northwest Territories, is highly
subjective. In this treatment, we include
plant taxa known to occur in a few localities
or from a relatively limited area. Before an
effective plan for conservation can be
proposed, botanical exploration efforts must
be redoubled. It is necessary for further
study before conservation measures can be
implemented on the basis of this list alone.

An endangered species is one whose
existence, in the region under consideration,
is threatened with immediate elimination
through all or a significant portion of the
region owing to the actions of man.

A threatened species is one that is
likely to become endangered, in the region
under consideration, unless the factors
affecting its vulnerability are reversed.

In this publication, we have not
determined whether any of the rare species
listed are also threatened or endangered,
since we do not have sufficient data to
evaluate the human affect. However, all
rare taxa may be regarded as potentially
vulnerable to human activities.

A peripheral species is one that, in
the region under consideration, occurs at the
edge of its main geographical range. In the
Northwest Territories, examples include:
those that have boreal (eg. Prunus
virginiana), prairie (eg. Salicornia rubra),
or aquatic (eg. Sparganium eurycarpum)
affinities to the south, and arctic-alpine
species (eg. Pedicularis oederi) that have
main ranges in Alaska and the Yukon
Territory.

An endemic taxon has a small world
population and occurs in a small
geographical area within the region under
consideration (eg. Poa porsildii and
Mertensia drummondii).

A disjunct taxon is separated from
the main distribution of the population by at
least 1000 km (eg. Eleocharis compressa
and Polygonum amphibium var. emersum).

A widely separated population is
one that is almost disjunct from its
neighbouring population and occurs in very
small numbers throughout its geographical
range (eg. Aster yukonensis and Poa
abbreviata ssp. jordalii).

A taxon (plural: taxa) is any
taxonomic grouping.

CRITERIA

Taxa included are native and rare in
the Northwest Territories, but not
necessarily restricted to that region. All the
taxa are documented by either, a verified
specimen, an acceptable literature report
(eg. a monograph), or a personal
communication with an expert. Evidence of
rarity is provided in the listed references and
distribution maps are provided for each
taxon. Species, subspecies, and varieties
are included, but forms, hybrids, and
introduced taxa are not. Only geographic
rarity has been assessed since we do not
have sufficient data to evaluate the
threatened or endangered status of the flora
of the Northwest Territories. However, all
rare taxa may be regarded as potentially
vulnerable to human activities.

Our basic criteria for rarity was that
the taxon either occurred in very few
localities or was restricted to a small area of
the Northwest Territories. Under special
circumstances, for example, (1) taxa
narrowly endemic to the Northwest
Territories (eg. Smelowskia calycina var.
media and Erigeron yukonensis) or (2) taxa
with additional small ranges outside the
Northwest Territories (eg. Phlox
richardsonii ssp. richardsonti), were
considered rare even though their range
within the Northwest Territories was
somewhat larger than usual.

The assessment of rarity is
sometimes difficult. Some plants may
appear rare because they are undercollected.
Some aquatic species are inconspicuous and
therefore easily overlooked, for example,
Potamogeton robbinsii, which occurs in
deep and muddy water and Limosella
aquatica, which may resemble seedlings of

other species. Also, some grasses, for
example, Puccinellia spp., are taxonomically
obscure, difficult to identify, and therefore,
undercollected by choice. Some plants may
not flower every year and therefore are not
collected because they are overlooked or
unidentifiable. As well, not all plants
flower in the period from mid-July to mid-
August when most botanizing is done.
Generally, geographic collecting patterns in
the Northwest Territories indicate that most
collecting has been done in the Mackenzie
district, while there has been relatively less
collecting done in the Keewatin and Franklin
districts. We cannot overemphasize the
need for botanizing in the Northwest
Territories. Such study is essential for the
expansion and refinement of the knowledge
of the flora and its conservation needs.

Peripheral taxa, irrespective of their
abundance elsewhere, were included if they
were rare in the Northwest Territories,
examples include: (1) arctic-alpine taxa that
extend into the northwestern corner of the
Northwest Territories from the Yukon
Territory and Alaska (eg. Minuartia
yukonensis and Pedicularis oederi), (2)
boreal taxa that extend from the south into
the southwestern part of the Northwest
Territories (eg. Ranunculus hispidus var.
nitidus and Elymus canadensis), (3) prairie
taxa that are at the northern limit of their
range in the Northwest Territories (eg.
Ranunculus rhomboideus and Salicornia
rubra), and (4) aquatic taxa that are at the
northern edge of their main range to the
south (eg. Sparganium eurycarpum). It may
be argued that peripheral taxa should not be
included on rare plant lists, since these taxa
are artifacts of the relationship between
subjective and natural boundaries.

However, peripheral taxa, because of their
potentially unique genetic characteristics, are
an important part of the biological diversity
of a region and may serve as indicators of
climatic change. Therefore, peripheral
species must be considered in any
conservation program.

METHODS

There are two comprehensive studies
that catalogue the flora of the Northwest
Territories. One is the Vascular Plants of
Continental Northwest Territories, Canada
(Porsild & Cody 1980) and the other is, the
Illustrated Flora of the Canadian Arctic
Archipelago (Porsild 1964). Distribution
maps of taxa occurring in the Northwest
Territories are found in Hultén and Fries’
Atlas of North European Vascular Plants
North of the Tropic of Cancer (1986), and
Hultén’s Flora of Alaska and Neighboring
Territories (1968). Concurrent with the
work done for the continental Northwest
Territories flora (Porsild & Cody 1980),
Cody (1979) produced a checklist titled,
Vascular Plants of Restricted Range in the
Continental Northwest Territories. Our
treatment is based on the works listed above
as well as on monographs and herbarium
specimens.

The distributional data in this
treatment includes the Arctic Archipelago
and the continental Northwest Territories,
however, specimen data from the islands in
James and Hudson Bay south of 60 degrees
latitude are not included. Although these
islands are politically part of the Northwest
Territories, they have not been included in
published floras of the Northwest
Territories. Phytogeographically, they are
more allied with the flora in the adjacent

provinces, Quebec and Ontario, and it
would be more appropriate to consider the
flora of these islands in connection with rare
plant lists for these regions.

In preparing this publication, a
complete working list of the vascular plants
of the Northwest Territories was compiled.
Candidate specimens were examined at the
National Herbarium of Canada, Ottawa
(CAN) and the Department of Agriculture
Herbarium, Ottawa (DAO) (abbreviations
according to Holmgren et al. 1990). These
herbaria have large collections of specimens
from the Northwest Territories. The
addition of records from the herbaria search
altered published distribution maps of some
candidate taxa. As well, specialists with
expertise on difficult groups were consulted
and relevant literature on distribution or
taxonomy (eg. regional and local floras,
monographs, phytogeographic papers, and
botanical and naturalist journals) were
reviewed. All taxa were subsequently
mapped. In the references listed for each
taxon, the following may be included: a list
of collections, correspondence’ with
specialists, published distribution maps, and
relevant citations.

Taxa that were excluded, along with
the reasons for their exclusion, are
documented in Appendix III. Reasons for
exclusion include: hybrids, introductions,
locality errors, misidentified or probably
misidentified taxa, taxonomic problems
created by taxonomically dubious taxa or
unpublished or misapplied names, and
finally widespread taxa which had either
large geographic ranges or large population
sizes. Some species with a small range
were treated as widespread if they were
subsumed into a wide-ranging species (eg.
Braya richardsonii and Draba pilosa).

Deciding a taxon’s rarity based on
distribution maps is not completely reliable.
Maps often contain large gaps in distribution
resulting from incomplete mapping or from
undercollecting. The data on which
published maps are based become outdated
as new collections are made. Furthermore,
distribution maps are more indicative of
where botanists have collected rather than
the geographic range of the species.
Common taxa collected infrequently may
appear rare, whereas, some populations of
rare plants have been repeatedly collected so
that they may appear to be common. Not
every specimen was reidentified, although
specimens were checked if problems were
suspected. This list should be regarded as
provisional until further botanizing is done
to fill apparent gaps.

FORMAT OF THE LIST

Taxa are listed alphabetically by
generic name. For each taxon the following
information may be given:

1. Scientific name and authority. The
nomenclature usually follows Kartesz
(1994), A Synonymized Checklist of the
Vascular Flora of the United States,
Canada, and Greenland. In other cases, the
nomenclature follows the Flora of North
America (Flora of North America Editorial
Committee 1993), or taxonomic
monographs.

2. Synonymy. Synonyms are included in
parentheses following the accepted name
only if they are necessary to locate a taxon
in our original sources. Also, synonyms are
cross-referenced in the main list.

3. Family Name.

4. References. The references document
the reason for the inclusion of a taxon on
the rare list. These may include: articles in
journals, monographs, comments in the
floras of the Northwest Territories (Porsild
1964, Porsild & Cody 1980), personal
communication with an expert, herbarium
abbreviations that refer to examined
specimens, and references to distribution
maps.

5. Phytogeography. This section indicates
the main phytogeographic region in which a
taxon occurs. The categories used are:
arctic, arctic-alpine, boreal, coastal,
cosmopolitan, montane, prairie, or aquatic.
These units have been interpreted broadly.

6. Rare Status. This section includes
information on the rare status of a taxon in
other parts of Canada. The rarity of a taxon
in other parts of Canada may be an
indication of the significance of its rarity in
the Northwest Territories. The occurrence
of rare taxa in the provinces and territories
or throughout Canada as a whole, is
documented in the following rare plant
publications:

Canadian Arctic (McJannet et al. 1993)
Quebec (Bouchard et al. 1983, Lavoie 1992)
Saskatchewan (Harms et al. 1992)

Prince Edward Island (Day & Catling 1991)
Newfoundland (Bouchard et al. 1991)
Canada (Argus & Pryer 1990, including annotations)
Ontario (Argus et al. 1982-1987)

British Columbia (Straley et al. 1985)
Alberta (Packer & Bradley 1984)

Yukon Territory (Douglas et al. 1981)
Manitoba (White & Johnson 1980)

New Brunswick (Hinds 1983)

Nova Scotia (Maher et al. 1978)

7. The Nature Conservancy Ranks. The
following Nature Conservancy element ranks
are given for each taxon when available:

Global Rank (G): worldwide status
Canada Rank (N):national status
Taxon Subrank (T):infra status

These ranks follow the system
devised by The Nature Conservancy (TNC)
(Argus and Pryer 1990) and were checked
using the TNC database (The Nature
Conservancy 1988). The degree to which a
taxon is imperiled is indicated on a scale of
one to five, with Q_ suggesting a
questionable taxonomic rank (Table 1). The
global ranks (G) are based on several
factors, such as abundance, range,
protection, and threats, as well as the
number of known _ occurrences. The
Canadian ranks (N), however, are based
solely on the number of known occurrences.
If a taxon is a subspecies or variety, a taxon
subrank (T) is added to the global and
national ranks. For example, the ranks, G5
and NS, suggest that the species is secure
globally and nationally. The subrank T1
suggests that the variety is extremely rare.

8. Habitat. This information is based on
the Flora of the Northwest Territories
(Porsild & Cody 1980), specimen label data,
and literature references.

9. Comment. This section includes special
remarks such as: endemism, disjunction,
widely separated populations, or possible
introductions.

10. Distribution Maps. The maps show
the range of each taxon within the
Northwest Territories, excluding the islands
in James and Hudson Bay south of 60
degrees latitude.

Table 1
The Nature Conservancy Element Ranks

1 = Critically imperiled because of
extreme rarity (5 or fewer occurrences).

2 = Imperiled because of rarity (6 to 20
occurrences).

3 = Rare or uncommon (21 to 100
occurrences).

4 = Apparently secure, with many
occurrences.

5 = Abundant and demonstrably secure,
with many occurrences

Q = Questionable taxonomic rank.

X = Extinct or extirpated, without
expectation that it will be rediscovered.

APPENDICES

Three appendices follow the main
list. Appendix I lists taxa alphabetically by
family; Appendix II lists taxa according to
their phytogeography in the Northwest
Territories. (i.e., aquatic, arctic, arctic-
alpine, boreal, coastal, cosmopolitan,
montane, and prairie); and Appendix III lists
candidate taxa that were excluded, along
with the reason for their exclusion.

DISTRIBUTION PATTERNS OF RARE
PLANTS IN THE
NORTHWEST TERRITORIES

The Northwest Territories covers a
vast area of approximately 1.3 million
square kilometres and is bigger in area than
of all three prairie provinces combined.
The territory has great variation in
topography and climatic regimes. Even
today, large segments are not easily
accessible and are therefore, botanically
undercollected. An area of this size
includes many different habitats such as:
sand dunes, estuaries, bogs, fens, lakes,
cliffs, forests, salt plains, grasslands, and
tundra. The Northwest Territories contains
the largest area of Arctic habitat in the
world and the only area, along with
Greenland of high arctic habitat in the
world. Several endemic taxa and other
plants of national significance occur in the
Northwest Territories.

The vast size of the Northwest
Territories and the difficulty of access to
this region has resulted in limited collecting
compared with other parts of Canada.
There are very few roads, so most collecting
is done by boat, helicopter, or airplane. In
the southwest corner of the territory,
collection patterns follow roads, whereas in
other parts of the territories where there are
no roads, collection patterns follow rivers,
lakes, and inhabited areas. Outside these
areas (i.e. roads, rivers, lakes, and inhabited
areas) one should remember that little or no
collecting has been done. In particular, the
district of Keewatin has been greatly
undercollected. These collecting patterns
give a false impression of actual
distributions and consequently affect our
assessment of rarity.

The distribution patterns of the 206
rare taxa can be considered in terms of: (1)
their occurrence in geographical provinces,
(2) rare status in other political jurisdictions
of Canada, and (3) national significance
either as rare endemics or as rare throughout
all of Canada.

Geographical Provinces

The Northwest Territories can be
divided into 8 geographical provinces (Fig.
1) (after Porsild & Cody 1980 and amended
by us): (1) Mackenzie Mountains
Province, (2) Richardson Mountains
Province, which extends from the Peel
River to the arctic coast, (3) Mackenzie
River Delta and Coastal Plain Province,
(4) Low Arctic Province, (5) Northern
Boreal Province, which is the region of
treed vegetation extending from the lower
Mackenzie River diagonally southeastward
to the southern border of the territory, (6)
Southern Boreal Province, which is
circumscribed by the upper Mackenzie River
and the Liard and Slave rivers, (7) Mid
Arctic Province, and (8) High Arctic
Province.

Approximately one-third of the rare
taxa in the Northwest Territories are boreal
and occur mainly in three provinces: the
Southern Boreal Province (31%) (Fig. 1,
Prov. 6), the Mackenzie Mountains Province
(20%) (Figure 1, Prov. 1) and the Northern
Boreal Province (15%) (Fig. 1, Prov. 5).
Most of these taxa are directly peripheral to
their main range south of the Northwest
Territories (eg. Elymus canadensis and
Osmorhiza depauperata), but some have
disjunct ranges (eg. Rosa blanda).

Figure Legend

(1) Mackenzie Mountains Province
(2) Richardson Mountains Province

(4) Low Arctic Province

(5) Northern Boreal Province
(6) Southern Boreal Province
(3) Mackenzie River Delta and Coastal Plain Province (7) Mid Arctic Province

(8) High Arctic Province

Figure 1. The geographical provinces in the Northwest Territories (after Porsild & Cody 1980 and McJannet, et

al. 1993).

There are 34 taxa that we have
defined as montane which occur in the
Mackenzie Mountains Province (eg.
Agoseris aurantiaca) and the Richardson
Mountains Province, (eg. Lesquerella
calderi) (Fig. 1, Prov. 1 and 2 respectively).

Another 27 taxa, defined as prairie
taxa, occur mainly around the Slave River
and Great Slave Lake in the Southern Boreal
Province (eg. Gentianopsis macounii) (Fig.
1, Prov. 5). Although the area around
Great Slave Lake is mainly boreal, prairie
vegetation occurs on salt plains, especially
west of the Slave River. This prairie region
apparently persisted here since postglacial

times (Raup 1935).

There are 16 taxa that occur in the
Arctic. Four taxa occur in the High Arctic
Province (Festuca vivipara ssp. glabra,
Phlox richardsonii ssp. richardsonü,
Puccinellia kurilensis, and Saxifraga
eschscholtzii) (Fig. 1, Prov. 8), with the
remaining taxa occurring in the Low Arctic
Province (eg. Carex rufina, Mertensia
drummondii, and Draba norvegica) and Mid
Arctic Province (eg. Lychnis alpina var.
alpina) (Fig. 1, Prov. 4 and 7 respectively).
Some taxa (eg. Braya pilosa and
Calamagrostis holmii) occur in both the Low
Arctic (Fig. 1, Prov. 4) and the Mackenzie

delta region (Fig. 1, Prov. 3). The High
Arctic grass, Puccinellia poacea, seems to
have an unusual disjunct occurrence in the
Mackenzie Delta that requires verification.

There are 27 taxa that have been
defined as arctic-alpine. Most of these taxa
have ranges extending either, eastward from
Alaska into the Richardson Mountains (eg.
Koeleria asiatica and Salix chamissonis)
(Fig. 1, Prov. 2) or, northward from
Quebec and Labrador onto southeast Baffin
Island (eg. Bartsia alpina) (Fig. 1, Prov. 4
& 7). Finally, we recognize 29 taxa as
clearly not belonging to any one geographic
province but are either cosmopolitan (eg.
Cryptogramma stelleri), or occur in coastal
(eg. Puccinellia kurilensis) or aquatic (eg.
Nuphar lutea ssp. polysepala) habitats.

Political Jurisdictions

Many taxa that are rare in the
Northwest Territories also appear on other
provincial and territorial lists of rare plants.
A survey of published rare plant lists (see
Methods for references) reveals the statistics
found in Table 2. Many of these taxa are
boreal or prairie species; others are wide-
ranging coastal or aquatic taxa. The
widespread rarity of such taxa suggests that
in order to protect their genetic diversity it
will be necessary to protect ecosystems
throughout the ranges of these taxa.

Table 2
The number of rare NWT taxa that are
also rare in other regions of Canada.

Political Jurisdiction Number of
rare NWT taxa

Yukon Territory 56

British Columbia 50
Canadian Arctic 49
Saskatchewan 26
Manitoba 26

Alberta 22
Newfoundland* 19

Ontario 16
Quebec* 16

Nova Scotia 15

Prince Edward Island 12

New Brunswick 5

* excluding Labrador

Table 3
Rare Endemics occurring in the
Northwest Territories

Aster nahanniensis

Castilleja yukonis

Douglasia arctica

Draba ogilviensis

Erigeron yukonensis

Lesquerella calderi

Mertensia drummondii

Mertensia paniculata var. alaskana
Papaver mcconnellii

Phlox richardsonii ssp. richardsonii
Poa porsildii

Puccinellia poacea

Rorippa crystallina

Salix ovalifolia var. arctolitoralis
Salix raupii

Senecio sheldonensis

Smelowskia calycina var. media
Synthyris borealis

Table 4
The Northwest Territories rarities that are
also rare throughout Canada

Antennaria friesiana ssp. alaskana
Aster nahanniensis

Aster yukonensis

Braya pilosa

Carex eleusinoides

Carex laxa

Carex rufina

Cerastium cerastioides
Cryptogramma sitchensis
Deschampsia cespitosa ssp. alpina
Draba ogilviensis

Dryas integrifolia ssp. chamissonis
Eritrichium splendens

Festuca lenensis

Gentianopsis detonsa ssp. detonsa
Haplopappus uniflorus ssp. uniflorus
Koeleria asiatica

Malaxis paludosa

Mertensia drummondii

Papaver mcconnellii

Poa abbreviata ssp. jordalii

Poa porsildii

Poa pseudoabbreviata

Podistera macounii

Polygonum caurianum ssp. hudsonianum
Potamogeton subsibiricus

Primula eximia

Puccinellia poacea

Ranunculus turneri

Rorippa barbareifolia

Rorippa crystallina

Salix chamissonis

Salix ovalifolia var. arctolitoralis
Salix raupii

Saxifraga eschscholtzii

Saxifraga stellaris

Scirpus rollandii

Smelowskia calycina var. media
Stellaria umbellata

10

Nationally Significant Taxa

There are 18 taxa that we have
classified as rare endemics occurring in the
Northwest Territories (Table 3) and 39 taxa
that are rare throughout their range in
Canada (Table 4). These nationally
significant taxa and their habitats deserve
special attention to ensure their continued
existence.

PROTECTION

This publication, as well as the other
thirteen rare plant publications, (for
references, see methods) have been
produced based on provincial or territorial
jurisdictions. The rationale being that we
wanted to provide the scientific data
necessary for the political jurisdiction
responsible for the protection of rare flora
within its boundaries, irrespective of its
occurrence and status elsewhere. An
important consideration in the Northwest
Territories, when considering the protection
of species at risk, is the allocation of land
and responsibilities for the conservation of
natural resources that are associated with
land claim settlements made with indigenous
peoples (Figure 2). It is necessary for
scientific concerns for species at risk to be
brought to their attention as well as to the
attention of the Federal Government.

The protection of ecosystems within
the Northwest Territories 1s the purview of
our National and Territorial parks systems.
Presently, the National and Territorial parks
in the Northwest Territories include some of

NWT and Yukon Land Claim
Settlement Regions

1. Inuvialuit (Final
Agreement, 1984)
2. Gwich'in

5. Dogrib
6. South Slave
7. Inuit

8. Yukon First Nations

Figure 2. NWT and Yukon land claim settlement Regions (New Parks North, March 1993, Government of Canada,

Northwest Territories and Yukon).

of the ranges of rare taxa. The two national
parks in the Arctic Archipelago, Ellesmere
Island National Park and Auyuitug National
Park, include the ranges of several rare taxa
(Finkelstein 1990). Plans for national parks
on Banks Island (Aulavik National Park) and
on north Baffin Island are well advanced
(Halfyard 1993). National parks are
planned for several areas along the treeline,
including: Thelon River, East Arm of Great
Slave Lake, and Bluenose Lake, Northwest
Territories (Finkelstein 1990). These and
other proposed parks in the Arctic
Archipelago, including Banks Island, central
Bathurst Inlet and Bylot Island, Northwest
Territories, will set a firm basis for
conservation in the Northwest Territories.
Wood Buffalo National Park includes the
ranges of many rare boreal and prairie
species and Nahanni National Park includes
the ranges of some Mackenzie Mountain

species. This network of parks is
encouraging but it should be noted that the
71 biologically important ecological sites
proposed by the International Biological
Program in the arctic portion of the
Northwest Territories (Nettleship & Smith
1975, Taschereau 1982) have yet to be
considered.

11

Territorial Parks National Parks (NP), Park Re- Territorial Park Proposals
1. Blackstone serves (NPR), Landmark, National 17. Beechey Island
2. Qaummaarviit Historic Sites (NHS) 18. Bishop's Residence
3. Kekerten 6. Auyuittuq NPR 19. Bloody Falls
4. Herschel Island 7. Nahanni NPR 20. Campbell Hills
5. Coal River Springs 8. Ellesmere Island NPR 21. Canol Trail
9. Wood Buffalo NP 22. Dodo Canyon
10. Aulavik NP 23. Fort Franklin
11. Ivvavik NP 24. Isabella Bay
ù 12. Kluane NPR 25. Katannilik
< iord 13. Pingo Canadian Landmark 26. Mallik Island
) 1 14. Our Lady of Good Hope 27. Marble Island
Re LS Church NHS 28. Meliadine River
4 : © 15. Klondike NHS (Dawson City) 29. Mission Island
EME ) ERA D 16. Yukon NHS (SS Keno) 30. Old Fort Rae/North
“iy 10 LS 1rèn 45; 31. Northwest Passage
ir a Resolptee” 52 > e & ey Pond, In net Expedition
/ \ AT j . / de River 32. Ram Plateau
oe à = ff: Fy © i [ A < ay ears a yn 33. Kusawa Lake
EE MW IRS elf ae | LS A 34. Carcross Dunes
eo 4 L + Sachs ‘Harbour HST (QA OB RSS Le \ABraughton Island
NG eau hy Ss Me ae ~ Noel = National Park and Natio!
ce ae Ne — SUR Poe > Historic Site Proposals
Old Cr / wre i ( } ee Us is à ag RS we Ve Pay nirtung 35. North Baffin
ts AE ER ee Nets r Satan EN, Sas 36. Wager Bay
= Sa) / Paula (em < Lea a PH HalPBeath ) = so ne a 37. Bluenose 4
Arctic Red River à aN SR an) De yA SIRS a 38. East Arm of Great Slave}
146 St ay 37 BQ ? 9 HDI qu \ 3 0) à (ce SU 39. Vuntut 7
Daws6n © #15 \ Ç ) \ , \ Cambri = oe STO ean + ar 5 -
48: Fort Good H Im Pe ao À r VW x SA sd os 2 ae : Heritage Rivers
a My shag 1 og Cnnermine Be ae FO {\ Sa Ba ue ay % 2 40. South Nahanni
5 ENT v . — Ne a8 pirat 25h Lake Harbour 41. Thelon ;
pren Well: = oe EN SN ape orse ( 42. Kazan 2
4 BS 47 ANT < 36 \ ER TE
w Fort Norma 5, ! = SS À ra Sia ee À
LA 6 ] # aiRartour | 3 Rr Q + Fe (Yukon Riv
A 2 e]
7 les we 201 . ae
16% % Whitehorse t | ke ; Proposed Heritage Rivers
A } i * Chesterfield de Ë | re: prea Red River
\ € J ( A / . Coppermine River
SN Edzo # Rae | 027 4 48. Bonnet Plume
reds >Fort Simpson #30 58! ‘i 3 49. Tatshenshini
han Buste wi Oe = “eLutselk’ e AN Det 5
L NN
FETE (-e Fort Liard x _ 20¢sFon Resolution i | e/Arviat Other Camere xia

Existing parks, park reserves,
game sanctuaries

& Hay River

Figure 3. Proposed and existing sites for Territorial Parks, National Parks, and other conservation areas (New
Parks North, March 1993, Government of Canada, Northwest Territories and Yukon).

FUTURE RESEARCH REQUIREMENTS

1. (a.) Field study is desperately needed to
fill in collecting gaps and to relocate taxa
known only from one or two localities.
Voucher collections of such _ rarities,
however, should be made only from
unthreatened populations.

(b.) Our knowledge of the distribution
of the flora, which is based on herbarium
specimens, needs updating and expanding.
Specimens in Canadian herbaria, and in

12

50. Thelon Game Sanctuary
51. Proposed Coburg Island " |
National Wildlife Area

: 52. Prince Leopold Island M

= sy Migratory Bird Sanctuary
: : 53. Proposed Nitsutlin River
National Wildlife Area |
ee — 54. Proposed Old Crow :
i — Management Area

be verified and mapped. Specimen label
data should be computerized and coordinates
determined so that localities can be plotted
on large scale maps.

|
|
|
critical herbaria in other countries, need to |
|
|
\

2} A comprehensive plan for the
conservation of the flora of the Northwest
Territories should be prepared and would
require the correlation of rare plants with:
natural area classifications, currently

protected areas, and current land use
patterns.

3. The Panarctic Flora, an initiative of the
Komarov Institute of Botany, St. Petersburg,
Russia, and the University of Alaska
Museum, Fairbanks, Alaska, must be
supported. This flora, by rationalizing
taxonomic nomenclature of circumpolar
flora and computerizing specimen label data,
will allow the assessment of rarity
worldwide, as well as the direct comparison
of circumpolar floras.

A FINAL CAVEAT

No checklist of this kind is ever
final; continual updating and revision is
required. Although we believe we have
assembled the best available information, we
are keenly aware of its shortcomings. The
distribution maps are based on old data;
there are large exploration gaps; and
taxonomic problems exist in many groups.
Floristic field study, the resolution of
taxonomic problems, and the
computerization of specimen label data,
could remedy some of these shortcomings.
Meanwhile, we hope our work will be of
use to those concerned with the protection of
rare plants and their habitats and that it will
contribute to a rational and comprehensive
conservation of northern ecosystems.

ACKNOWLEDGEMENTS

We thank Dr. Susan Aiken, Canadian
Museum of Nature, Ottawa; Dr. Jacques
Cayouette, Agriculture Canada, Ottawa; Dr.
Peter Ball, University of Toronto,
Mississauga; Dr. Sylvia Edlund, Geological
Survey of Canada, Ottawa, and Dr. Kaye

MacInnes, Indian and Northern Affairs,
Yellowknife, for reviewing the manuscript.
Their comments were very helpful to us but
the responsibility for decisions on rarity is
ours. We sincerely thank Dr. Warren H.
Wagner, Jr., University of Michigan, Ann
Arbor for his valuable contribution
regarding the genus Botrychium. We also
thank The Nature Conservancy for
providing the TNC Global and Canada
Ranks and Rob Lipkin, Alaska Heritage
Program, Anchorage, for providing updated
TNC global Ranks. We also like to thank
Ronald Seale, Government of the NWT,
Yellowknife, for his permission to publish
figures from New Parks North. We also
sincerely thank the Ottawa Field-
Naturalists’ Club for their financial support
towards the publishing costs of this work.

13

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LIST OF RARE VASCULAR PLANTS IN THE
NORTHWEST TERRITORIES

Acorus americanus (Raf.) Raf.
(Acorus calamus auct. non L.)
ARACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Boreal
Status: Rare in Newfoundland.
TNC Global Ranks: G5
Habitat: Wetlands.
Comment: Disjunct, Possible introduction.

Acorus americanus

Acorus calamus = A. americanus

Adoxa moschatellina L.
ADOXACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Boreal
Status: Rare in Ontario, Manitoba, and British
Columbia.
TNC Global Ranks: GS
Habitat: Moist, partly shaded woods, and thickets.

Adoxa moschatellina

Agastache foeniculum (Pursh) Kuntze
LAMIACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN.
Phytogeography: Prairie
TNC Global Ranks: G4G5
Habitat: Thickets and grassy clearings.

Agastache foeniculum

15

Agoseris aurantiaca (Hook.) Greene
ASTERACEAE à
Reference: Cody 1979, Porsild & Cody 1980; No
CAN, DAO.

Phytogeography: Montane

Status: Rare in Quebec.

TNC Global Ranks: G5

Habitat: Meadows, hot springs, and disturbed
areas.

Agoseris aurantiaca

Agrostis exarata Trin.
POACEAE
Reference: Hultén 1968, Cody 1979, Porsild & à
Cody 1980; CAN, DAO. Do
Phytogeography: Boreal
Status: Rare in the Yukon Territory.
TNC Global Ranks: G5
Habitat: Sedge meadows.

Alisma triviale = A. plantago-aquatica var.
americanum Agrostis exarata

Alisma plantago-aquatica L. var. americanum J.A.
Schultes
(Alisma triviale Pursh)
ALISMATACEAE
Reference: Porsild & Cody 1980; DAO.
Phytogeography: Aquatic
Status: Rare in Newfoundland.
TNC Global Ranks: GSTS
Habitat: Marshes and muddy shores.
Comment: New to the NWT flora since Porsild &
Cody (1980).

Anaphalis margaritacea var. subalpina = A. Alisma plantago-aquatica
margaritacea americanum

16

Anaphalis margaritacea (L.) Benth. & Hook.
(Anaphalis margaritacea var. subalpina
Gray)
ASTERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Boreal
Status: Rare in the Yukon Territory and
Saskatchewan.
TNC Global Ranks: G5
Habitat: Subalpine wooded areas and meadows.

Angelica lucida L.
(Coelopleurum gmelinii (DC.) Ledeb.)
APIACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Montane
Status: Rare in the Yukon Territory.
TNC Global Ranks: G5
Habitat: Shrubby alpine tundra.

Antennaria neoalaskana = A. friesiana ssp.
alaskana

Antennaria friesiana (Trautv.) Ekman ssp. alaskana
(Malte) Hultén
(Antennaria neoalaskana Porsild)
ASTERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN.
Phytogeography: Arctic-alpine
Status: Rare in the Yukon Territory, Canada, and
the Canadian Arctic.
TNC Global Ranks: G5?T4
TNC Canada Ranks: N3T1
Habitat: Alpine ridges and snowbeds.

Apocynum cannabinum var. hypericifolium = A.
cannabinum var. glaberrimum

Anaphalis margaritacea

Angelica lucida

Antennaria friesiana alaskana

17

Apocynum cannabinum L. var. glaberrimum A.
DC.
(Apocynum sibiricum Jacq., Apocynum
cannabinum Var. hypericifolium A. Gray)
APOCYNACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Boreal
Status: Rare in Newfoundland and British

Columbia.
TNC Global Ranks: GST?
Habitat: Exposed river banks. Apocynum cannabinum

glaberrimum
Apocynum sibiricum = A. cannabinum var.
glaberrimum

Arabidopsis salsuginea (Pallas) N. Busch
(Thellungiella salsuginea (Pallas) O.E.
Schulz)

BRASSICACEAE

Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.

Phytogeography: Prairie

Status: Rare in the Yukon Territory,

Alberta, British Columbia, and the Canadian
Arctic.

TNC Global Ranks: GU

Habitat: Salt plains and sandy beaches.

Comment: Widely separated populations. Arabidopsis salsuginea
Arabis holboellii var. pinetorum (Tidestrom) Rollins à
(Arabis pinetorum Tidestrom) Ko

BRASSICACEAE

Reference: Rollins 1993, Cody (unpublished).
Phytogeography: Boreal

TNC Global Ranks: GST?

Habitat: Dry, open areas and on shallow soil.
Comment: New to the NWT flora since Porsild &
Cody (1980).

Arabis holboellii pinetorum

18

Arabis lyrata L. var. lyrata
BRASSICACEAE
Reference: Cody (unpublished), Mulligan
(unpublished); DAO.
Phytogeography: Boreal
Habitat: Sandy, open areas.
Status: Rare in Manitoba and British Columbia
(according to Mulligan (unpublished)).
Comment: New to the NWT flora since Porsild &
Cody (1980).

Arabis lyrata lyrata
Arabis pinetorum = A. holboellii var. pinetorum

Arabis holboellii pinetorum

Arnica amplexicaulis Nutt.
ASTERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980.
Phytogeography: Montane
Status: Rare in the Yukon Territory.
TNC Global Ranks: G4
Habitat: Moist subalpine woods.

Arnica amplexicaulis

Arnica cordifolia Hook.
ASTERACEAE à
Reference: Hultén 1968, Cody 1979, Porsild & Ko
Cody 1980; CAN, DAO.
Phytogeography: Montane
Status: Rare in Ontario and Manitoba.
TNC Global Ranks: G5
Habitat: Shrubby alpine tundra and subalpine
woods.

Arnica cordifolia

19

Arnica mollis Hook.
ASTERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN.
Phytogeography: Montane
Status: Rare in the Yukon Territory.
TNC Global Ranks: G5
Habitat: Alpine meadows and slopes.
Comment: Disjunct.

Artemisia alaskana Rydb.
ASTERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO.
Phytogeography: Arctic-alpine
Status: Rare in British Columbia.
TNC Global Ranks: G4
Habitat: Cliffs and scree slopes.

Artemisia ludoviciana Nutt. ssp. ludoviciana

(Artemisia ludoviciana var. gnaphalodes (Nutt.)

Torr. & Gray)
ASTERACEAE

Reference: Hultén 1968, Cody 1979, Porsild &

Cody 1980; DAO.

Phytogeography: Prairie

TNC Global Ranks: GST?

Habitat: Open woodlands and grassy areas.

Artemisia ludoviciana var. gnaphalodes = A.
ludoviciana ssp. ludoviciana

20

Arnica mollis

|
|
Ari adel eee

Artemisia alaskana

Artemisia ludoviciana ludovician

Asplenium trichomanes-ramosum L.
(Asplenium viride Huds.)
ASPLENIACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Boreal
Status: Rare in the Yukon Territory, New
Brunswick, Nova Scotia, Quebec, and the Canadian
Arctic.
TNC Global Ranks: G4
Habitat: Moist rocky slopes and crevices.

Asplenium trichomanes-ramosum

Asplenium viride = A. trichomanes-ramosum

Aster nahanniensis Cody
ASTERACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Boreal
Status: Rare in Canada.
TNC Global Ranks: G1
TNC Canada Ranks: N1
Habitat: Hot springs and moist areas.
Comment: Endemic.

Aster nahanniensis

Aster pauciflorus Nutt.
ASTERACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Prairie
Status: Rare in Alberta.
TNC Global Ranks: G4
Habitat: Salt plains and wet, marshy areas.

Aster pauciflorus

21

Aster yukonensis Cronq.
ASTERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980, Harris 1992.
Phytogeography: Montane
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G1G2
TNC Canada Ranks: N1
Habitat: Subalpine stoney, silty, and saline places.
Comment: Few widely separated populations.

Aster yukonensis

Astragalus canadensis L.
FABACEAE
Reference: Cody 1979, Porsild & Cody 1980,
CAN, DAO.
Phytogeography: Boreal
TNC Global Ranks: G5
Habitat: River banks and moist, open woods.

Astragalus canadensis

Atriplex gmelinii C.A. Mey. ex Bong.
CHENOPODIACEAE à
Reference: Hultén 1968, Cody 1979, Porsild & Ko
Cody 1980; DAO.

Phytogeography: Coastal

Status: Rare in the Canadian Arctic

TNC Global Ranks: G5

Habitat: Gravelly beaches at river mouth.
Comment: Disjunct.

Atriplex gmelinii

22

Atriplex subspicata (Nutt.) Rydb.
CHENOPODIACEAE à
Reference: Cody 1979, Porsild & Cody 1980; Do
DAO. Ay IX.
Phytogeography: Prairie CS #4
TNC Global Ranks: G5
Habitat: Salt plains.

Avenochloa hookeri = Avenula hookeri Atriplex subspicata

Avenula hookeri (Scribn.) Holub
(Helictotrichon hookeri (Scribn.) Henr.,
Avenochloa hookeri (Scribn.) Holub)
POACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.

Phytogeography: Prairie

Status: Rare in the Yukon Territory and British
Columbia.

TNC Global Ranks: G5

Habitat: Dry grasslands.

Avenula hookeri

Bartsia alpina L.
SCROPHULARIACEAE
Reference: Porsild 1964, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Arctic-alpine
Status: Rare in Newfoundland and Manitoba.
TNC Global Ranks: G5
Habitat: Grassy slopes and wet sedge meadows.

Blysmus rufus = Scirpus rufus var. neogaeus

Botrychium boreale ssp. obtusilobum = B.
pinnatum

Botrychium lunaria ssp. minganense = B. Bartsia alpina
minganense

23

Botrychium minganense Victorin
(Botrychium lunaria (L.) Sw. ssp. minganense
(Victorin) Calder & Taylor)
OPHIOGLOSSACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Warren Wagner, pers. comm.
Phytogeography: Boreal
Status: Rare in Saskatchewan, British Columbia,
and the Canadian Arctic.
TNC Global Ranks: G4
Habitat: Grassy meadows.
Comment: Widespread rarity. Botrychium minganense

Botrychium multifidum (Gmel.) Rupr.
OPHIOGLOSSACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN.
Phytogeography: Boreal
TNC Global Ranks: G5
Habitat: Grasslands.

Botrychium multifidum

Botrychium pinnatum St. John
(Botrychium boreale (Fries) Milde ssp.
obtusilobum auct. non (Rupr.) Clausen)
OPHIOGLOSSACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986.
Phytogeography: Montane
Status: Rare in the Yukon Territory.
TNC Global Ranks: G5
Habitat: Grassy tundra.

Botrychium pinnatum

24

Botrychium simplex E. Hitchc.
OPHIOGLOSSACEAE à
Reference: Hultén & Fries 1986; Warren Wagner, Ko
pers. comm.

Phytogeography: Boreal

Status: Rare in Prince Edward Island,
Newfoundland, Nova Scotia, Saskatchewan,
Alberta, and British Columbia.

TNC Global Ranks: G5

Habitat: Moist meadows and shores.

Comment: New to the NWT flora since Porsild &
Cody (1980). Botrychium simplex

Botrychium spathulatum W.H. Wagner
OPHIOGLOSSACEAE
Reference: Wagner & Wagner 1990.
Phytogeography: Boreal
TNC Global Ranks: G3G4
Habitat: Dry south-facing slopes.
Comment: New to the NWT flora since Porsild &
Cody (1980).

Botrychium spathulatum

Braya pilosa Hook.
(Braya purpurascens (R. Br.) Bunge ssp. pilosa
(Hook.) Hultén)
BRASSICACEAE
Reference: Harris 1985, Hultén & Fries 1986.
Phytogeography: Arctic
Status: Rare in Canada and the Canadian Arctic.
TNC Global Ranks: GH
TNC Canada Ranks: NX
Habitat: Sandy seashores.

Braya purpurascens ssp. pilosa = B. pilosa Braya pilosa

25

Calamagrostis holmii Lange
POACEAE
Reference: Hultén & Fries 1986.
Phytogeography: Arctic
Status: Rare in the Canadian Arctic.
TNC Global Ranks: G4G5
Comment: Possibly conspecific with C. stricta
(Craig Greene, pers. comm.).

Calamagrostis holmii

Callitriche anceps Fern.
CALLITRICHACEAE
Reference: Hultén 1968, Cody 1979, Porsild & 5
Cody 1980. Ap
Phytogeography: Aquatic
Status: Rare in the Yukon Territory, British
Columbia, and the Canadian Arctic.

TNC Global Ranks: G5
Habitat: Shallow ponds.
Comment: Disjunct.

Callitriche anceps

Caltha palustris L. var. palustris
RANUNCULACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Boreal
Status: Rare in Nova Scotia and the Canadian
Arctic.
TNC Global Ranks: GST?
Habitat: Shallow water and wet marshy places.
Comment: Disjunct.

Caltha palustris palustris

26

Cardamine microphylla M.F. Adams
BRASSICACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO.
Phytogeography: Arctic-alpine
TNC Global Ranks: G4
Habitat: Wet places on slopes and stream banks.

Cardamine microphylla

Carex arcta Boott
CYPERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Boreal
Status: Rare in the Yukon Territory,
Newfoundland, Manitoba, Saskatchewan, and the
Canadian Arctic.
TNC Global Ranks: G5
Habitat: Wet woodland bogs, marshes, and sandy
beaches.

Carex arcta
Carex arctogena = C. capitata ssp. arctogena

Carex crawfordii Fern.
CYPERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO.
Phytogeography: Boreal
Status: Rare in the Yukon Territory.
TNC Global Ranks: G5
Habitat: Damp meadows.

Carex crawfordii

21

Carex deweyana Schwein.

CYPERACEAE &
Reference: Hultén 1968, Cody 1979, Porsild & So
Cody 1980; CAN, DAO. Se

Phytogeography: Boreal

Status: Rare in the Yukon Territory.

TNC Global Ranks: G5

Habitat: Open woods and river bank thickets.

Carex deweyana

Carex duriuscula C.A. Mey.
(Carex stenophylla Wahlenb. ssp. eleocharis
(Bailey) Hultén)
CYPERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO.
Phytogeography: Prairie
Habitat: Dry grasslands and slough edges.

Carex duriuscula

Carex eleusinoides Turcz. ex C.A. Mey.
CYPERACEAE
Reference: Hultén 1968, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Montane
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G5
TNC Canada Ranks: N2
Habitat: Wet gravelly river banks and meadows.

Carex eleusinoides

28

Carex heleonastes Ehrh. ex L.f.
CYPERACEAE
Reference: Porsild & Cody, 1980, Hultén & Fries
1986; DAO.
Phytogeography: Boreal
Status: Rare in the Yukon Territory, Quebec,
Ontario, Manitoba, Saskatchewan, and British
Columbia.
TNC Global Ranks: G4
Habitat: Bogs.

Carex heleonastes

Carex laxa Wahlenb.

CYPERACEAE

Reference: Cody 1979, Porsild & Cody 1980,

Hultén & Fries 1986; CAN. AT
Phytogeography: Arctic-alpine Ds ASD _

Status: Rare in the Yukon Territory, Canada, and
the Canadian Arctic.

TNC Global Ranks: G3G4

TNC Canada Ranks: N1

Habitat: Tundra bogs.

Comment: Disjunct, widely separated populations. FN.

Lee

Carex laxa

Carex mackenziei Krecz.
CYPERACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Coastal
Status: Rare in Prince Edward Island, Manitoba,
and Saskatchewan.
TNC Global Ranks: G4?
Habitat: Brackish marshes.
Comment: Disjunct.

Carex mackenziei

29

Carex peckii Howe
CYPERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO.
Phytogeography: Boreal
Status: Rare in the Yukon Territory and British
Columbia.
TNC Global Ranks: G4G5
Habitat: Open woodlands.

Carex peckii

Carex phaeocephala Piper
CYPERACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Montane
Status: Rare in the Yukon Territory.
TNC Global Ranks: G4
Habitat: Alpine meadows, thickets, and slopes.

Carex phaeocephala

Carex prairea Dewey
CYPERACEAE
Reference: Hultén & Fries 1986, Cody
(unpublished).
Phytogeography: Boreal
Status: Rare in Quebec and British Columbia.
TNC Global Ranks: G5?
Habitat: Bogs.
Comment: Disjunct, New to the NWT flora since
Porsild & Cody (1980).

Carex prairea

30

Carex retrorsa Schwein.
CYPERACEAE
Reference: Cody 1979, Porsild & Cody 1980; ay
CAN, DAO.
Phytogeography: Boreal
TNC Global Ranks: G5
Habitat: Woodland marshes.

Carex retrorsa

Carex rufina Drej.
CYPERACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN. AT
Phytogeography: Arctic
Status: Rare in Manitoba, Canada, and the
Canadian Arctic.
TNC Global Ranks: G3
TNC Canada Ranks: N3
Habitat: Edge of ponds and snowbeds.
Comment: Disjunct.

Carex rufina

Carex stenophylla ssp. eleocharis = C. duriuscula

Carex sychnocephala Carey
CYPERACEAE
Reference: Cody, 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.
Phytogeography: Boreal
Status: Rare in the Yukon Territory, Quebec, and
British Columbia.
TNC Global Ranks: G4
Habitat: Wet places and open woodland meadows.

Carex sychnocephala

a1

Carex trisperma Dewey
CYPERACEAE
Reference: Cody 1979, Porsild & Cody 1980.
Phytogeography: Boreal
Status: Rare in Saskatchewan, Alberta, British
Columbia, and the Canadian Arctic.
TNC Global Ranks: G5
Habitat: Bogs.

Carex trisperma

Castilleja yukonis Pennell
SCROPHULARIACEAE
Reference: Hultén 1968, Cody 1979, Porsild & à
Cody 1980; CAN. Ao
Phytogeography: Boreal
Status: Rare in the Canadian Arctic.

TNC Global Ranks: G3

Habitat: Spruce woods, treed bogs, and grassy
slopes.

Comment: Endemic.

Castilleja yukonis

Cerastium cerastioides (L.) Britt.
CARYOPHYLLACEAE
Reference: Porsild 1964, Hultén & Fries 1986; à
DAO (Photo). Ko
Phytogeography: Arctic-alpine
Status: Rare in Newfoundland, Quebec, and
Canada.

TNC Global Ranks: G4
TNC Canada Ranks: N2
Habitat: Marshy tundra.

Cerastium cerastioides

32

Cerastium maximum L.
CARYOPHYLLACEAE

Reference: Cody 1979, Porsild & Cody 1980
Hultén & Fries 1986; DAO (Photo).

Phytogeography: Arctic-alpine

Status: Rare in the Canadian Arctic.

TNC Global Ranks: G3

Habitat: Grassy slopes and open thickets.

Chamaerhodos erecta (L.) Bunge ssp. nuttallii

(Pickering ex Rydb.) Hultén
ROSACEAE

Reference: Hultén 1968, Cody 1979, Porsild &

Cody 1980; DAO.
Phytogeography: Prairie

TNC Global Ranks: G5?T5?
Habitat: Dry calcareous slopes.

Chenopodium rubrum L.
CHENOPODIACEAE

Reference: Cody 1979, Porsild & Cody 1980,

Hultén & Fries 1986; CAN.
Phytogeography: Prairie
TNC Global Ranks: G5

Habitat: Salt plains and disturbed soils.

Cerastium maximum

i

:

!

* 1

Som,’ |
a erty

Chamaerhodos erecta nuttallii

Chenopodium rubrum

33

Chimaphila umbellata (L.) W. Bart. ssp.
occidentalis (Rydb.) Hultén ‘
(Chimaphila umbellata var. occidentalis (Rydb.) Ao

Blake)

PYROLACEAE

Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.

Phytogeography: Boreal

TNC Global Ranks: G5ST5

Habitat: Woodlands.

ON SN.

i
|
I
1

GET Mets

Chimaphila umbellata
occidentalis

Chimaphila umbellata var. occidentalis = C.
umbellata ssp. occidentalis

Cirsium drummondii Torr. & Gray
ASTERACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Prairie
Status: Rare in Ontario and British Columbia.
TNC Global Ranks: G5
Habitat: Dry meadows and disturbed areas.

Cirsium drummondii

Cirsium foliosum (Hook.) DC.
ASTERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO.
Phytogeography: Montane
TNC Global Ranks: G5
Habitat: Sedge and grass meadows.

Cirsium foliosum

34

Claytonia megarhiza (Gray) Parry ex S. Wats.
PORTULACACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Montane
Status: Rare in British Columbia.
TNC Global Ranks: G4?
Habitat: Alpine tundra and scree and talus slopes.
Comment: Disjunct.

Coelopleurum gmelinii = Angelica lucida

Cornus suecica L.
CORNACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.
Phytogeography: Boreal
Status: Rare in Nova Scotia and British Columbia.
TNC Global Ranks: G5
Habitat: Wet mossy areas.
Comment: Disjunct.

Crassula aquatica (L.) Schoenl.
(Tillaea aquatica L.)
CRASSULACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.
Phytogeography: Aquatic
Status: Rare in Prince Edward Island,
Newfoundland, Nova Scotia, Quebec, Ontario, and
British Columbia.
TNC Global Ranks: G5
Habitat: Shallow ponds.
Comment: Disjunct.

Cryptogramma crispa var. sitchensis = C.
sitchensis

LT LT.

Claytonia megarhiza

à
CR
Si

Cornus suecica

Crassula aquatica

35

Cryptogramma sitchensis (Rupr.) T. Moore
(Cryptogramma crispa (L.) R. Br. ex Hook. var. à
sitchensis (Rupr.) C. Christens.) No
ADIANTACEAE

Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980, Hultén & Fries 1986; CAN, DAO.
Phytogeography: Montane

Status: Rare in Canada.

TNC Global Ranks: G4

TNC Canada Ranks: N4

Habitat: Calcareous talus slopes and moraine.

Cryptogramma sitchensis

Cryptogramma stelleri (Gmel.) Prantl
ADIANTACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.
Phytogeography: Cosmopolitan
Status: Rare in the Yukon Territory, Nova Scotia,
British Columbia, and the Canadian Arctic.
TNC Global Ranks: G5
Habitat: Moist shale slopes.

Cryptogramma stelleri

Danthonia spicata (L.) Beauv. ex Roemer & J.A.
Schultes
POACEAE
Reference: Porsild & Cody 1980, Darbyshire &
Cayouette 1989; CAN, DAO.
Phytogeography: Boreal
Status: Rare in Alberta.
TNC Global Ranks: GS
Habitat: Rocky places.
Comment: New to the NWT flora since Porsild &
Cody (1980).

Deschampsia alpina = D. cespitosa ssp. alpina Danthonia spicata

36

Deschampsia cespitosa (L.) Beauv. ssp. alpina (L.)

Tzvelev ù
(Deschampsia alpina (L.) Roemer & J.A. Schultes) So
POACEAE
Reference: Porsild 1964, Hultén & Fries 1986.
Phytogeography: Arctic-alpine
Status: Rare in Quebec, Canada, and the Canadian
Arctic.
TNC Global Ranks: G5ST1
TNC Canada Ranks: N5T1
Habitat: Alpine meadows and lake shores.

Deschampsia cespitosa alpina
Descurainia pinnata var. brachycarpa = D.
pinnata ssp. brachycarpa

Descurainia pinnata (Walt.) Britt. ssp. brachycarpa

(Richards.) Detling Û
(Descurainia pinnata var. brachycarpa (Richards.) So
Fern.) By AD

BRASSICACEAE oY

Reference: Cody 1979, Porsild & Cody 1980;
DAO.

Phytogeography: Boreal

TNC Global Ranks: GSTU

Habitat: Sandy beaches and disturbed areas.

Descurainia pinnata brachycarpa

Distichlis spicata var. stricta = D. spicata

Distichlis spicata (L.) Greene
(Distichlis spicata var. stricta (Torr.) Scribn.)
POACEAE
Reference: Cody 1979, Porsild & Cody 1980.
Phytogeography: Prairie
Status: Rare in Prince Edward Island and New
Brunswick.
TNC Global Ranks: G5
Habitat: Salt plains.

Distichlis spicata

37

Douglasia arctica Hook.
PRIMULACEAE N
Reference: Cody 1979, Porsild & Cody 1980; Do
CAN, DAO.
Phytogeography: Arctic-alpine
Status: Rare in the Canadian Arctic.
TNC Global Ranks: G3
TNC Canada Ranks: N2
Habitat: Gravelly alpine slopes.
Comment: Endemic.

Douglasia arctica

Douglasia ochotensis (Willd.) Hulten
PRIMULACEAE
Reference: Hultén 1968; UBC.
Phytogeography: Arctic-alpine
Habitat: Stony mountain slopes.
Comment: New to the NWT flora since Porsild &
Cody (1980).

Douglasia ochotensis

Draba albertina Greene
BRASSICACEAE
Reference: Cody 1979, Porsild & Cody 1980.
Phytogeography: Montane
TNC Global Ranks: G4
Habitat: Moist alpine and subalpine slopes.

Draba albertina

38

Draba incerta Payson
BRASSICACEAE ù
Reference: Hultén 1968, Cody 1979, Porsild & Ko
Cody 1980, Cody et. al 1992; DAO.
Phytogeography: Montane
Status: Rare in the Canadian Arctic.
TNC Global Ranks: G5
Habitat: Alpine tundra and rocky slopes.

Draba incerta

Draba norvegica Gunn.
BRASSICACEAE
Reference: Porsild 1964, Mulligan & Cody 1968,
Cody 1979, Porsild & Cody 1980, Hultén & Fries
1986, Cody (unpublished); CAN, DAO.
Phytogeography: Arctic
Status: Rare in Nova Scotia and Ontario.
TNC Global Ranks: G5
Habitat: Tundra and rocky slopes.
Comment: Widespread rare.

Draba norvegica

Draba ogilviensis Hultén
BRASSICACEAE à
Reference: Porsild & Cody 1980, Hultén & Fries Ko
1986; DAO.
Phytogeography: Montane
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G2
TNC Canada Ranks: N2
Habitat: Lake shores and alpine meadows.
Comment: Endemic.

Draba ogilviensis

39

Draba porsildii Mulligan
BRASSICACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Montane
Status: Rare in the Yukon Territory and British
Columbia.
TNC Global Ranks: G3
Habitat: Alpine meadows and scree and talus
slopes.

Dryas chamissonis = D. integrifolia ssp.
chamissonis

Dryas integrifolia Vahl ssp. chamissonis (Spreng. )
Scoggan
(Dryas chamissonis Spreng.)
ROSACEAE
Reference: Porsild & Cody 1980; DAO.
Phytogeography: Arctic
Status: Rare in Canada and the Canadian Arctic.
TNC Global Ranks: GST?
Habitat: Gravelly places and tundra.
Comment: Disjunct.

Dryopteris carthusiana (Vill.) H.P. Fuchs
(Dryopteris spinulosa (O.F. Muell.) Watt)
DRYOPTERIDACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Boreal
TNC Global Ranks: G5
Habitat: Rich woods.

Dryopteris dilatata, see D. expansa

Dryopteris dilatata ssp. americana = D. expansa

40

Draba porsildii

Dryas integrifolia chamissonis

Dryopteris carthusiana

Dryopteris expansa (K. Presl) Fraser-Jenkins &
Jermy
(Dryopteris dilatata Am. auth. pro parte,
Dryopteris dilatata ssp. americana (Fischer)
Hultén)
DRYOPTERIDACEAE
Reference: Porsild & Cody 1980, Hultén & Fries
1986, Flora of North America Editorial Committee
1593; DAO.
Phytogeography: Montane
TNC Global Ranks: G5
Habitat: Moist woods and slopes. Dryopteris expansa

Dryopteris phegopteris = Phegopteris connectilis
Dryopteris spinulosa = D. carthusiana

Elatine triandra Schkuhr
ELATINACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Aquatic
Status: Rare in Ontario, Alberta, Saskatchewan,
and British Columbia.
TNC Global Ranks: G5
Habitat: Muddy shores and shallow pond margins.
Comment: Disjunct.

Elatine triandra

Eleocharis compressa Sullivant
CYPERACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Prairie
Status: Rare in Saskatchewan and Alberta.
TNC Global Ranks: G4
Habitat: Calcareous muddy and sandy shores.
Comment: Disjunct.

Eleocharis compressa

41

Elymus canadensis L.
POACEAE à
Reference: Cody 1979, Porsild & Cody 1980; Qo
DAO.
Phytogeography: Boreal
TNC Global Ranks: G5
Habitat: Sandy and gravelly places.

Elymus canadensis

Epilobium hornemannii Reichenb. ssp.
hornemannii
ONAGRACEAE à
Reference: Hultén 1968, Porsild & Cody 1980, Ao
Cody (unpublished); DAO.
Phytogeography: Montane
TNC Global Ranks: GSTS
Habitat: Wet alpine tundra.
Comment: New to the NWT flora since Porsild &
Cody (1980).

se * aS =

|
|
| Wee sare

Epilobium hornemannii
hornemannii

Epilobium leptophyllum Raf.
ONAGRACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Boreal
Status: Rare in British Columbia.
TNC Global Ranks: G5
Habitat: Marshes, sloughs, bogs, and sedge
meadows.

Erigeron acer var. debilis, see E. acris var. debilis

Epilobium leptophyllum

42

Erigeron acris (L.) Nesom var. debilis Gray

(Erigeron acer (sic) var. debilis in Hultén & Fries
1986) sy

ASTERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980, Hultén & Fries 1986; CAN, DAO.
Phytogeography: Montane
TNC Global Ranks: G5T4
Habitat: Alpine shale cliffs, crevices, and rocky
slopes.

Erigeron acris debilis

Erigeron alpiniformis Cronq.
ASTERACEAE
Reference: Hultén & Fries 1986; CAN.
Phytogeography: Arctic
Status: Rare in the Canadian Arctic.
Habitat: Dry tundra.
Comment: New to the NWT flora since Porsild
(1964).

Erigeron alpiniformis

Erigeron yukonensis Rydb.
ASTERACEAE N
Reference: Cody 1979, Porsild & Cody 1980; So
CAN, DAO. Be IHD
Phytogeography: Boreal OY 3
Status: Rare in the Canadian Arctic.
TNC Global Ranks: G3G4
Habitat: Calcareous rocky slopes.
Comment: Endemic.

Erigeron yukonensis

43

Eritrichium splendens Kearney
BORAGINACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Arctic-alpine
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G3G4
TNC Canada Ranks: N1
Habitat: Alpine scree slopes and rock ledges.

Eritrichium splendens

Euthamia graminifolia (L.) Nutt. var. graminifolia
(Solidago graminifolia (L.) Salisb. var. major

(Michx.) Fern.) à
ASTERACEAE So
Reference: Cody 1979, Porsild & Cody 1980: ES
CAN, DAO. Ÿ

Phytogeography: Boreal

Status: Rare in British Columbia.

TNC Global Ranks: G5T?

Habitat: Sandy, silty, and gravelly river banks and
flats.

ae APS.

BD

Euthamia graminifolia
graminifolia

Festuca lenensis Drobov
(Festuca ovina L. ssp. alaskana Holmen)
POACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Aiken & Darbyshire 1990; DAO.
Phytogeography: Arctic-alpine
Status: Rare in the Yukon Territory, Canada, and
the Canadian Arctic.
TNC Global Ranks: G4G5
TNC Canada Ranks: N1
Habitat: Dry tundra.

Festuca ovina ssp. alaskana = F. lenensis Festuca lenensis

44

Festuca vivipara (L.) Smith ssp. glabra Frederiksen
POACEAE à
Reference: Aiken & Darbyshire 1990; DAO. Ko
Phytogeography: Arctic
Status: Rare in the Canadian Arctic.
TNC Global Ranks: G4G5QT?
Habitat: Sandy and rocky places.

Festuca vivipara glabra

Gentiana affinis Griseb.
GENTIANACEAE
Reference: Cody 1979, Porsild & Cody 1980; à
CAN, DAO. Ko
Phytogeography: Prairie
Status: Rare in British Columbia.
TNC Global Ranks: G5
Habitat: Gravelly and silty river bars.
Comment: Disjunct.

Gentiana macounii = Gentianopsis macounii

Gentiana affinis
Gentiana richardsonii = Gentianopsis detonsa ssp.
detonsa

Gentianopsis detonsa (Rottb.) Ma ssp. detonsa
(Gentiana richardsonii Porsild)
GENTIANACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Arctic
Status: Rare in Canada and the Canadian Arctic.
TNC Global Ranks: G4T?
Habitat: Wet coastal meadows and brackish mud
flats.

Gentianopsis detonsa detonsa

45

Gentianopsis macounii (Holm) Iltis
(Gentiana macounii Holm)
GENTIANACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Prairie
Status: Rare in Quebec.
TNC Global Ranks: G5
Habitat: Gravelly beaches, marly shores, and
marshy areas.

Gentianopsis macounii

Grindelia squarrosa (Pursh) Dunal
ASTERACEAE
Reference: Cody 1979, Porsild & Cody 1980; N
CAN, DAO. Ap
Phytogeography: Prairie Bw I
TNC Global Ranks: G5
Habitat: Salt plains.

F S
t |
Habenaria orbiculata = Platanthera orbiculata
var. orbiculata.t._.——""- ee lee
Hammarbya paludosa = Malaxis paludosa Grindelia squarrosa
Haplopappus uniflorus (Hook.) Torr. & Gray ssp.
uniflorus
ASTERACEAE
Reference: Cody 1979, Porsild & Cody 1980; 5
DAO. Ko

Phytogeography: Prairie

Status: Rare in Alberta and Canada.

TNC Global Ranks: G4T?

TNC Canada Ranks: N2T2

Habitat: Salt plains.

Comment: Sometimes included in Pyrrocoma
(Kartesz 1994).

|
|
|
|
|
|

Haplopappus uniflorus uniflorus |
Helictotrichon hookeri = Avenula hookeri

46

Heuchera richardsonii R. Br.
SAXIFRAGACEAE
Reference: Cody 1979, Porsild & Cody 1980; ad
CAN, DAO (Photo).
Phytogeography: Boreal
Status: Rare in British Columbia.
TNC Global Ranks: G5
Habitat: Woodland meadows.

Heuchera richardsonii

Hieracium albiflorum Hook.
ASTERACEAE
Reference: Cody 1979, Porsild & Cody 1980; à
CAN, DAO. Ao
Phytogeography: Montane
Status: Rare in Saskatchewan.
TNC Global Ranks: G4G5
Habitat: Floodplain meadows and subalpine
woods.

Hieracium albiflorum

Hippuris montana Ledeb.
HIPPURIDACEAE à
Reference: Hultén 1968, Cody 1979, Porsild & Ko
Cody 1980; CAN.
Phytogeography: Montane
Status: Rare in Alberta.
TNC Global Ranks: G4
Habitat: Shallow ponds and creeks.
Comment: Disjunct.

Hippuris montana

47

Hudsonia tomentosa Nutt.
CISTACEAE à
Reference: Cody 1979, Porsild & Cody 1980; Ko
CAN, DAO.
Phytogeography: Boreal
Status: Rare in Prince Edward Island, Nova
Scotia, Quebec, and Manitoba.
TNC Global Ranks: G5
Habitat: Jack pine woods and sand blow-outs.

Hudsonia tomentosa

Impatiens capensis Meerb.
BALSAMINACEAE
Reference: Cody 1979, Porsild & Cody 1980, AE
Hultén & Fries 1986; CAN. Bw HD
Phytogeography: Boreal OY
TNC Global Ranks: GS
Habitat: Wet woodlands.
Comment: Disjunct.

Impatiens capensis

Isoetes lacustris L.

(Isoetes macrospora Durieu)
ISOETACEAE |
Reference: Hultén & Fries 1986, Cody
(unpublished), Flora of North America Editorial
Committee 1993.

Phytogeography: Aquatic

Status: Rare in Prince Edward Island and
Saskatchewan.

TNC Global Ranks: G4G5

Habitat: Shallow, sandy lake margins.

Comment: Disjunct, New to the NWT flora since
Porsild & Cody (1980).

Isoetes macrospora = I. lacustris Isoetes lacustris

48

Juncus dudleyi Wieg.

(Juncus tenuis sensu Hultén & Fries, Juncus tenuis à
Willd. var. dudleyi (Wieg.) Hermann) Do
JUNCACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986, DAO.

Phytogeography: Boreal

Status: Rare in the Yukon Territory, Prince
Edward Island, and Newfoundland.

TNC Global Ranks: G5

Habitat: Wet calcareous meadows and river banks.

Juncus dudleyi

Juncus stygius L. ssp. americanus (Buch.) Hultén
JUNCACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO (Photo).
Phytogeography: Boreal
Status: Rare in the Yukon Territory, New
Brunswick, Nova Scotia, Saskatchewan, and British
Columbia.
TNC Global Ranks: GST5
Habitat: Wet margins of bogs and marly seepages.

Juncus tenuis, see J. dudleyi Juncus stygius americanus

Juncus tenuis var. dudleyi = J. dudleyi

Juncus trifidus L. à
JUNCACEAE Ko
Reference: Porsild 1964, Hultén 1986; CAN, BH IHD a

DAO.

Phytogeography: Arctic-alpine

Status: Rare in New Brunswick and Nova Scotia.
TNC Global Ranks: G5

Habitat: Dry, sandy, or gravelly places.

OS™

i
|
:
<a a ee

Juncus trifidus

49

Juncus vaseyi Engelm.
JUNCACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Boreal
Status: Rare in Nova Scotia.
TNC Global Ranks: G3G5
Habitat: Moist margins of lakes, rivers, and
sloughs.

Koeleria asiatica Domin
POACEAE

Reference: Hultén 1968, Cody 1979, Porsild &

Cody 1980; CAN, DAO.
Phytogeography: Arctic-alpine

Status: Rare in the Yukon Territory, Canada, and

the Canadian Arctic.

TNC Global Ranks: G4

TNC Canada Ranks: N1

Habitat: Shale scree slopes and dry tundra.

Lesquerella calderi Mulligan & Porsild
BRASSICACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Montane
TNC Global Ranks: G2G3
Habitat: Limestone flats and alpine slopes.
Comment: Endemic.

Ligusticum mutellinoides = Podistera macounii

50

Juncus vaseyi

Koeleria asiatica

Lesquerella calderi

Limosella aquatica L.
SCROPHULARIACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986: CAN, DAO.
Phytogeography: Aquatic
Status: Rare in the Yukon Territory,
Newfoundland, Ontario, British Columbia, and the
Canadian Arctic.
TNC Global Ranks: G5
Habitat: Wet, muddy or sandy pond margins.
Comment: Widespread rarity.

Limosella aquatica

Liparis loeselii (L.) L.C. Rich.

ORCHIDACEAE

Reference: Cody 1979, Porsild & Cody 1980, AE

Hultén & Fries 1986: DAO. Bw IHD
>

Phytogeography: Boreal

Status: Rare in Saskatchewan and British
Columbia.

TNC Global Ranks: G5

Habitat: Fens.

Comment: Disjunct.

Liparis loeselii

Lobelia dortmanna L.
LOBELIACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986: DAO.
Phytogeography: Aquatic
Status: Rare in Prince Edward Island, Manitoba,
Alberta, and British Columbia.
TNC Global Ranks: G4
Habitat: Shallow, sandy shores of lakes and ponds.

Lobelia dortmanna

ay :

Luetkea pectinata (Pursh) Kuntze

ROSACEAE à
Reference: Hultén 1968, Cody 1979, Porsild & So

Cody 1980; CAN, DAO. By 32
Phytogeography: Montane CS #4 &

TNC Global Ranks: G5
Habitat: Alpine tundra and snowbeds.

Luetkea pectinata

Luzula rufescens Fisch. ex E. Mey.
JUNCACEAE
Reference: Cody 1979, Porsild & Cody 1980, ù
Hultén & Fries 1986; CAN. Ao
Phytogeography: Boreal
Status: Rare in British Columbia.
TNC Global Ranks: G5
Habitat: Bogs, marshes, and river bars.

Luzula rufescens

Lychnis alpina L. var. alpina
(Viscaria alpina (L.) G. Don)
CARYOPHYLLACEAE
Reference: Porsild 1964; CAN.
Phytogeography: Arctic-alpine
Status: Rare in the Canadian Arctic.
TNC Global Ranks: GST?
Habitat: Sandy and gravelly slopes.

Lychnis alpina alpina

2

Lycopus uniflorus Michx.
LAMIACEAE à
Reference: Hultén 1968, Cody 1979, Porsild & Do
Cody 1980; DAO.
Phytogeography: Boreal
TNC Global Ranks: G5
Habitat: Sandy margins of lakes and streams.

Lycopus uniflorus

Malaxis paludosa (L.) Sw.
(Hammarbya paludosa (L.) Kuntze)
ORCHIDACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.
Phytogeography: Boreal
Status: Rare in Ontario, Manitoba, Saskatchewan,
Alberta, British Columbia, and Canada.
TNC Global Ranks: G5
Canada Ranks: N3
Habitat: Treed bog.

Malaxis paludosa

Mertensia drummondii (Lehm.) G. Don
BORAGINACEAE
Reference: Porsild 1964, Hultén 1968, Cody 1979, à
Porsild & Cody 1980, Cody et al. 1992; DAO. Qo
Phytogeography: Arctic
Status: Rare in the Canada and the Canadian
Arctic.
TNC Global Ranks: G1Q
TNC Canada Ranks: N1
Habitat: Sandy and gravelly ridges and sand
banks.
Comment: Endemic.

Mertensia drummondii

53

Mertensia paniculata (Ait.) G. Don var. alaskana
(Britt.) L.O. Williams
BORAGINACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO.
Phytogeography: Boreal
TNC Global Ranks: GST?
TNC Canada Ranks: NST2
Habitat: Open woods and river banks.
Comment: Endemic.

CT a

Mertensia paniculata alaskana

Mimulus guttatus Fisch. ex DC.

SCROPHULARIACEAE &

Reference: Cody 1979, Porsild & Cody 1980, No

Hultén & Fries 1986; CAN, DAO. Bw ASD
S

Phytogeography: Boreal

Status: Rare in the Yukon Territory,
Saskatchewan, and Alberta.

TNC Global Ranks: G5

Habitat: Wet meadows and streams.

Mimulus guttatus

Minuartia macrocarpa (Pursh) Ostenf.
CARYOPHYLLACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Arctic-alpine
Status: Rare in the Canadian Arctic.
TNC Global Ranks: G4
Habitat: Alpine tundra.

Minuartia macrocarpa

54

Minuartia yukonensis Hultén
CARYOPHYLLACEAE ‘
Reference: Hultén 1968, Cody 1979, Porsild & Ao
Cody 1980; CAN, DAO.

Phytogeography: Arctic-alpine

Status: Rare in the Canadian Arctic.

TNC Global Ranks: G3G4

Habitat: Alpine scree slopes and dry places.

Minuartia yukonensis

Monarda fistulosa L. var. menthifolia (Graham)
Fern.

LAMIACEAE

Reference: Straley 1986.

Phytogeography: Boreal

Status: Rare in British Columbia.

TNC Global Ranks: G5T?

Habitat: River banks.

Comment: New to the NWT flora since Porsild &

Cody (1980).

Monarda fistulosa menthifolia

Myriophyllum alterniflorum DC.
HALORAGACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO (Photo).
Phytogeography: Aquatic
Status: Rare in Manitoba, Saskatchewan, and the
Canadian Arctic.
TNC Global Ranks: G5
Habitat: Shallow lakes and ponds.

Myriophyllum alterniflorum

55

Najas flexilis (Willd.) Rostk. & Schmidt
NAJADACEAE

Reference: Porsild & Cody 1980, Hultén & Fries

1986.
Phytogeography: Aquatic

Status: Rare in Newfoundland and Saskatchewan.

TNC Global Ranks: G5
Habitat: Shallow lakes and ponds.

Nuphar lutea (L.) Sibthorp & Sm. ssp. polysepala

(Engelm.) E.O. Beal
(Nuphar polysepala Engelm.)
NYMPHAEACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986.
Phytogeography: Aquatic
Status: Rare in the Canadian Arctic.
TNC Global Ranks: GSTS5
Habitat: Lakes and slow moving streams.

Nuphar polysepala = N. lutea ssp. polysepala

Nymphaea tetragona ssp. leibergii = N. tetragona

Nymphaea tetragona Georgi
(Nymphaea tetragona ssp. leibergii (Morong)
Porsild)
NYMPHAEACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986.
Phytogeography: Aquatic
Status: Rare in Quebec, Saskatchewan, Alberta,
and British Columbia.
TNC Global Ranks: G5

Habitat: Shallow lakes and slow moving streams.

56

Najas flexilis

Nuphar lutea polysepala

Nymphaea tetragona

ee

Orthocarpus luteus Nutt.
SCROPHULARIACEAE y
Reference: Cody 1979, Porsild & Cody 1980, Do
Chuang & Heckard 1992; DAO.
Phytogeography: Prairie
TNC Global Ranks: G4
Habitat: Sandy river banks and lake shores.

Orthocarpus luteus

Osmorhiza depauperata Phil.

(Osmorhiza obtusa (C. & R.) Fern.)
APIACEAE y
Reference: Hultén 1968, Cody 1979, Porsild & So
Cody 1980.

Phytogeography: Boreal

Status: Rare in the Yukon Territory,
Newfoundland, and Nova Scotia.
TNC Global Ranks: G5

Habitat: Rich woods.

Osmorhiza depauperata
Osmorhiza obtusa = O. depauperata

Oxytropis podocarpa Gray
FABACEAE
Reference: Porsild 1964; CAN, DAO.
Phytogeography: Arctic
Status: Rare in Quebec and British Columbia.
TNC Global Ranks: G4
Habitat: Gravelly and sandy beach ridges and
tundra.
Comment: Limited and disrupted range.

Oxytropis podocarpa

ay |

Oxytropis scammaniana Hultén
FABACEAE à
Reference: Hultén 1968, Cody 1979, Porsild & Ao
Cody 1980; DAO.
Phytogeography: Montane
Status: Rare in British Columbia.
TNC Global Ranks: G3G4
Habitat: Alpine shale and limestone slopes.

Oxytropis scammaniana

Oxytropis sericea Nutt. var. spicata (Hook.)
Barneby
(Oxytropis spicata (Hook.) Standl., Oxytropis
sericea sensu Hultén)
FABACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Prairie
Status: Rare in the Yukon Territory and Manitoba.
TNC Global Ranks: G5T?
Habitat: Grasslands and river terraces.

Oxytropis sericea spicata

Oxytropis spicata = O. sericea var. spicata

Papaver mcconnellii Hultén
PAPAVERACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980, Cody (unpublished); DAO.
Phytogeography: Montane
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G1Q
TNC Canada Ranks: N1
Habitat: Alpine shale slopes.
Comment: Endemic.

Papaver mcconnellii

58

— 7x

Pedicularis macrodonta Richards.
(Pedicularis parviflora sensu Porsild & Cody)
SCROPHULARIACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN.
Phytogeography: Boreal
Status: Rare in the Yukon Territory, Manitoba,
British Columbia, and the Canadian Arctic.
TNC Global Ranks: G4Q
Habitat: Bogs and marshes.

Pedicularis oederi Vahl ex Hornem.
SCROPHULARIACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.
Phytogeography: Arctic-alpine
Status: Rare in British Columbia.
TNC Global Ranks: G5
Habitat: Moist alpine tundra.

Pedicularis parviflora, see P. macrodonta

Pellaea glabella var. nana = P. glabella ssp.
occidentalis

Pellaea glabella Mett. ex Kuhn ssp. occidentalis
(E.E. Nelson) Windham
(Pellaea glabella var. nana (Richards.) Cody)
PTERIDACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Flora of North America Editorial Committee 1993
(map incorrect, see text); DAO.
Phytogeography: Boreal
Status: Rare in Manitoba and Saskatchewan.
TNC Global Ranks: GST?
Habitat: Limestone cliffs.

Pedicularis macrodonta

Pedicularis oederi

Pellaea glabella occidentalis

59

Penstemon gormanii Greene
SCROPHULARIACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN.
Phytogeography: Montane
Status: Rare in British Columbia.
TNC Global Ranks: G4
Habitat: Dry mountain slopes.

Phegopteris connectilis (Michx.) Watt
(Dryopteris phegopteris (L.) C. Christens.,
Thelypteris phegopteris (L.) Slosson)

THELYPTERIDACEAE

Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986, Cody & Britton 1989; CAN,
DAO.

Phytogeography: Cosmopolitan

Status: Rare in the Yukon Territory, Manitoba,
Saskatchewan, Alberta, and the Canadian Arctic.
TNC Global Ranks: G5

Habitat: Subalpine slopes.

Phlox alaskensis = P. richardsonii ssp. alaskensis

Phlox richardsonii Hook. ssp. alaskensis (Jordal)
Wherry
(Phlox alaskensis Jordal, Phlox sibirica sensu
Hultén)
POLEMONIACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO.
Phytogeography: Arctic-alpine
TNC Global Ranks: G4T?
Habitat: Stoney slopes.

60

Penstemon gormanii

Phegopteris connectilis

Phlox richardsonii alaskensis

Phlox richardsonii Hook. ssp. richardsonii
(Phlox sibirica ssp. richardsonii (Hook.) Hultén)
POLEMONIACEAE
Reference: Porsild 1964, Hultén 1968, Cody 1979,
Porsild & Cody 1980; CAN, DAO.
Phytogeography: Arctic
Status: Rare in the Canadian Arctic.
TNC Global Ranks: G4T2T3Q
Habitat: Sandy and gravelly hilltops and barrens.
Comment: Endemic.

Phlox sibirica, see P. richardsonii ssp. alaskensis Phlox richardsonii richardsonii

Phlox sibirica ssp. richardsonii = P. richardsonii
ssp. richardsonii

Phragmites australis (Cav.) Trin. ex Steud.
POACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.
Phytogeography: Cosmopolitan
Status: Rare in Prince Edward Island and British
Columbia.
TNC Global Ranks: G5
Habitat: Marshes and lake shores.

Phragmites australis

Physostegia ledinghamii (Boivin) Cantino
(Physostegia parviflora sensu Cody, Porsild &
Cody 1980)

LAMIACEAE

Reference: Cody 1979, Porsild & Cody 1980,
Cantino 1981.

Phytogeography: Boreal

Status: Rare in British Columbia.

Habitat: Along edges of river, lakes, and ditches.

Physostegia parviflora, see P. ledinghamii

Physostegia ledinghamii

61

Platanthera orbiculata (Pursh) Lindl. var.
orbiculata
(Habenaria orbiculata (Pursh) Torr.)
ORCHIDACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Boreal
TNC Global Ranks: G5?
Habitat: Spruce and larch forest.

Platanthera orbiculata orbiculate

Poa abbreviata R. Br. ssp. jordalii (Porsild) Hultén
(Poa jordalii Porsild)

POACEAE |
Reference: Hultén 1968, Cody 1979, Porsild & 6 5
Cody 1980, Cody et. al 1990; DAO.

Phytogeography: Montane

Status: Rare in Canada.

TNC Global Ranks: GST?

TNC Canada Ranks: N3T1

Habitat: Dry calcareous slopes and tundra.
Comment: Widely separated populations.

Poa abbreviata jordalii
Poa jordalii = P. abbreviata ssp. jordalii

Poa juncifolia = P. secunda

Poa porsildii Gjaerevoll
POACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Montane
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G2
TNC Canada Ranks: N2
Habitat: Turfy alpine slopes and meadows.
Comment: Endemic.

Poa porsildii

62

Poa pseudoabbreviata Roshev.
POACEAE
Reference: Hultén 1968, Cody et. al 1990, Cody
(unpublished).
Phytogeography: Montane
Status: Rare in the Yukon Territory and Canada
(both according to Cody et. al 1990)
Habitat: Rocky slopes, snow beds, and ridges.
Comment: New to the NWT flora since Porsild &
Cody (1980).

Poa pseudoabbreviata

Poa scabrella = P. secunda

Poa secunda J. Presl
(Poa juncifolia Scribn., Poa scabrella (Thurb.)
Benth. ex Vasey)
POACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Kellogg 1985; DAO.
Phytogeography: Cosmopolitan
Status: Rare in the Yukon Territory and Quebec.
TNC Global Ranks: G5
Habitat: Fens.

Poa secunda

Podistera macounii (Coult. & Rose) Mathias &
Const.
(Ligusticum mutellinoides (Crantz) Willar)
APIACEAE
Reference: Cody (unpublished); CAN.
Phytogeography: Arctic-alpine
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G4
TNC Canada Ranks: N2
Habitat: Ridge tops and rock strips.

Podistera macounii

63

Polygonum amphibium L. var. emersum Michx.
(Polygonum coccineum Muhl. ex Willd.)
POLYGONACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Aquatic
TNC Global Ranks: G4T5
Habitat: Stream banks and wet meadows.
Comment: Disjunct.

Polygonum caurianum B.L. Robins. ssp.
hudsonianum Wolf & McNeill
POLYGONACEAE
Reference: Cody 1979, Porsild & Cody 1980;
Wolf & McNeill 1986.
Phytogeography: Coastal
Status: Rare in Canada and the Canadian Arctic.
TNC Global Ranks: GST?
Habitat: Gravelly pond margins and lake shores.
Comment: Widely separated populations.

Polygonum coccineum = P. amphibium var.
emersum

Potamogeton foliosus var. macellus = P. foliosus
var. foliosus

Potamogeton foliosus Raf. var. foliosus
(Potamogeton foliosus var. macellus Fern.)
POTAMOGETONACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Aquatic
Status: Rare in the Yukon Territory, Prince
Edward Island, and Newfoundland.
TNC Global Ranks: GST?
Habitat: Shallow still waters.

64

Polygonum amphibium emersum

Polygonum caurianum
hudsonianum

Potamogeton foliosus foliosus

©
‘
e

Potamogeton illinoensis Morong
POTAMOGETONACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.
Phytogeography: Aquatic
Status: Rare in Quebec, Manitoba, and British
Columbia.
TNC Global Ranks: G5
Habitat: Still waters.
Comment: Disjunct.

Potamogeton illinoensis

Potamogeton natans L.
POTAMOGETONACEAE
Reference: Cody 1979, Porsild & Cody 1980, AE
Hultén & Fries 1986; DAO. À 32
Phytogeography: Aquatic se a
TNC Global Ranks: GS
Habitat: Still waters.

Potamogeton natans

Potamogeton obtusifolius Mert. & Koch
POTAMOGETONACEAE
Reference: Porsild & Cody 1980, Hultén & Fries
1986, Cody (unpublished); DAO.
Phytogeography: Aquatic
Status: Rare in the Yukon Territory,
Newfoundland, Nova Scotia, Manitoba,
Saskatchewan, Alberta, and British Columbia.
TNC Global Ranks: G5
Habitat: Shallow lakes and ponds.
Comment: New to the NWT flora since Porsild &
Cody (1980), disjunct.

Potamogeton porsildiorum = P. subsibiricus Potamogeton obtusifolius

65

Potamogeton robbinsii Oakes
POTAMOGETONACEAE

Reference: Cody 1979, Porsild & Cody 1980; AE

CAN.

Phytogeography: Aquatic

Status: Rare in Manitoba, Saskatchewan, and

Alberta.

TNC Global Ranks: G5

Habitat: Still waters.

Comment: Disjunct.

Potamogeton robbinsii

Potamogeton subsibiricus Hagstr.
(Potamogeton porsildiorum Fern.)
POTAMOGETONACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980, Cody (unpublished); CAN, DAO.
Phytogeography: Aquatic
Status: Rare in the Yukon Territory, Ontario, and
Canada.
TNC Global Ranks: G3
TNC Canada Ranks: N2
Habitat: Shallow streams and ponds.
Comment: Small global range.

Potamogeton subsibiricus

Potentilla crantzii = P. tabernaemontani

Potentilla tabernaemontani Aschers. 5
(Potentilla crantzii (Crantz) G. Beck ex Fritsch) Do
ROSACEAE CSS

Reference: Porsild 1964, Hultén & Fries 1986;
CAN, DAO.

Phytogeography: Arctic-alpine

TNC Global Ranks: G4

Habitat: Tundra.

TT ES

Potentilla tabernaemontani

66

a a i

Primula eximia Greene
(Primula tschuktschorum ssp. cairnsiana Porsild,
Primula tschuktschorum var. arctica (Koidzumi) ni)
Ferm. p.p.)
PRIMULACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO.
Phytogeography: Montane
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G5
TNC Canada Ranks: N1
Habitat: Meadows and stream margins. Primula eximia

Primula tschuktschorum ssp. cairnesiana = P.
eximia

Primula tschuktschorum var. arctica = P. eximia

Prunus virginiana L.
ROSACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Boreal
TNC Global Ranks: G5
Habitat: Thickets.

Prunus virginiana

Puccinellia kurilensis (Takeda) Honda
(Puccinellia pumila (Vasey) A.S. Hitchc.)
POACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN.
Phytogeography: Coastal
Status: Rare in the Canadian Arctic.
Habitat: Sand dunes and beaches.

Puccinellia kurilensis

67

Puccinellia poacea Sorensen
POACEAE
Reference: Porsild 1964; CAN, DAO.
Phytogeography: Arctic
Status: Rare in Canada and the Canadian Arctic.
TNC Global Ranks: Gl
TNC Canada Ranks: N1
Habitat: River banks, floodplains, and tidal flats.
Comment: Endemic.

Puccinellia poacea

Puccinellia pumila = P. kurilensis

Ranunculus allenii B.L. Robins.
RANUNCULACEAE
Reference: Porsild 1964; CAN, DAO.
Phytogeography: Arctic-alpine
Status: Rare in Quebec.
TNC Global Ranks: G3G5
Habitat: Wet tundra.

Ranunculus allenii

Ranunculus hispidus Michx. var. nitidus (Muhl. ex
Ell.) T. Duncan à
(Ranunculus septentrionalis Poir.) Do
RANUNCULACEAE
Reference: Cody 1979, Porsild & Cody 1980.
Phytogeography: Boreal
Status: Rare in Manitoba
TNC Global Ranks: G5T5
Habitat: Willow thickets and slough margins.

Ranunculus hispidus nitidus

68

Ranunculus pensylvanicus L.f.
RANUNCULACEAE à
Reference: Hultén 1968, Cody 1979, Porsild & Ko
Cody 1980; DAO.

Phytogeography: Boreal

Status: Rare in Prince Edward Island and
Newfoundland.

TNC Global Ranks: G5

Habitat: Disturbed and marshy places.
Comment: Possible introduction.

Ranunculus pensylvanicus

Ranunculus rhomboideus Goldie
RANUNCULACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Prairie
Status: Rare in British Columbia.
TNC Global Ranks: G4
Habitat: Salt plains.

Ranunculus septentrionalis = R. hispidus var.
nitidus Ranunculus rhomboideus

Ranunculus turneri Greene
RANUNCULACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Arctic-alpine
Status: Rare in the Yukon Territory, Canada, and
the Canadian Arctic.
TNC Global Ranks: G2Q
TNC Canada Ranks: N2
Habitat: Subalpine meadows.

Rhodiola rosea = Sedum rosea

Ranunculus turneri

69

Rhynchospora alba (L.) Vahl
CYPERACEAE à
Reference: Cody 1979, Porsild & Cody 1980, Ko
Hultén & Fries 1986; DAO.
Phytogeography: Boreal
TNC Global Ranks: G5
Habitat: Fens and bogs.

Rhynchospora alba

Rorippa barbareifolia (DC.) Kitagawa
(Rorippa hispida (Desv.) Britt. var. barbareifolia
(DC.) Hultén)
BRASSICACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Boreal
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G4G5
TNC Canada Ranks: N2
Habitat: Disturbed sites.
Comment: Possible introduction.

Rorippa barbareifolia

Rorippa crystallina Rollins
BRASSICACEAE
Reference: Cody 1979, Porsild & Cody 1980, à
Rollins 1993; DAO. Ko
Phytogeography: Boreal
Status: Rare in Canada.

TNC Global Ranks: Gl

TNC Canada Ranks: N1

Habitat: Carex meadows and marshes.
Comment: Endemic, Possible introduction.

Rorippa hispida var. barbareifolia = R. Rorippa crystallina
barbareifolia

70

Rosa blanda Ait.
ROSACEAE à
Reference: Cody 1979, Porsild & Cody 1980 Ko
CAN.
Phytogeography: Boreal
Status: Rare in Saskatchewan.
TNC Global Ranks: G5
Habitat: Gravelly river terraces.
Comment: Disjunct.

Rosa blanda

Rumex acetosa L. ssp. alpestris (Jacq.) A. Love
POLYGONACEAE y
Reference: Cody 1979, Porsild & Cody 1980, Do
Hultén & Fries 1986; CAN.

Phytogeography: Arctic-alpine
Status: Rare in the Yukon Territory.
Habitat: Moist alpine and subalpine meadows.

Rumex acetosa alpestris

Ruppia cirrhosa (Petag.) Grande
(Ruppia spiralis L. ex Dumort.)
POTAMOGETONACEAE à
Reference: Cody 1979, Porsild & Cody 1980, Ko
Hultén & Fries 1986; DAO.
Phytogeography: Aquatic
Status: Rare in Manitoba.
TNC Global Ranks: G5
Habitat: Shallow lakes.

Ruppia spiralis = R. cirrhosa

Ruppia cirrhosa

71

Salicornia rubra A. Nels.
CHENOPODIACEAE à
Reference: Cody 1979, Porsild & Cody 1980, Vo
Hultén & Fries 1986; DAO.
Phytogeography: Prairie
TNC Global Ranks: G4
Habitat: Salt plains.

Salix arctolitoralis = S. ovalifolia var.
arctolitoralis Salicornia rubra

Salix chamissonis Anderss.
SALICACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Arctic-alpine
Status: Rare in the Yukon Territory and Canada.
TNC Global Ranks: G3G4
TNC Canada Ranks: N2
Habitat: Tundra.

Salix chamissonis

Salix ovalifolia Trautv. var. arctolitoralis (Hultén)
Argus

(Salix arctolitoralis Hultén)

SALICACEAE

Reference: Hultén 1968, Cody 1979, Porsild &

Cody 1980; CAN.

Phytogeography: Arctic

Status: Rare in the Yukon Territory, Canada, and

the Canadian Arctic.

TNC Global Ranks: GST3T4

TNC Canada Ranks: N2T2

Habitat: Sand beaches and terraces.

Comment: Endemic.

Salix ovalifolia arctolitoralis

a

Salix raupii Argus
SALICACEAE
Reference: Argus 1986; CAN.
Phytogeography: Boreal
Status: Rare in British Columbia and Canada.
TNC Global Ranks: G2
TNC Canada Ranks: N2
Habitat: Gravel floodplains and treed bogs.
Comment: Endemic, New to the NWT flora since
Porsild & Cody (1980).

Salix raupii

Salix sphenophylla Skvort.
SALICACEAE
Reference: Argus 1973; DAO.
Phytogeography: Arctic
Status: Rare in the Canadian Arctic.
TNC Global Ranks: G4
Habitat: Moist tundra.
Comment: New to the NWT flora since Porsild &
Cody (1980).

Salix sphenophylla

Sanguisorba officinalis L.
ROSACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO (Photo).
Phytogeography: Boreal
Status: Rare in the Yukon Territory.
TNC Global Ranks: G5
Habitat: Wet tundra.

Sanguisorba officinalis

73

Sarracenia purpurea L.
SARRACENIACEAE à
Reference: Cody 1979, Porsild & Cody 1980; Ko
CAN, DAO.
Phytogeography: Boreal
Status: Rare in British Columbia.
TNC Global Ranks: G5
Habitat: Bogs.

Sarracenia purpurea

Saxifraga eschscholtzii Sternb.
SAXIFRAGACEAE
Reference: Hultén 1968, Porsild & Cody 1980;
CAN.
Phytogeography: Arctic
Status: Rare in the Yukon Territory, Canada, and
the Canadian Arctic.
TNC Global Ranks: G4
TNC Canada Ranks: N1
Habitat: Calcareous gravelly slopes.

Saxifraga eschscholtzii

Saxifraga ferruginea Graham
SAXIFRAGACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN.
Phytogeography: Montane
TNC Global Ranks: G5
Habitat: Moist rocky ledges.
Comment: Disjunct.

Saxifraga ferruginea

74

Saxifraga stellaris L.
SAXIFRAGACEAE
Reference: Porsild 1964, Hultén & Fries 1986.
Phytogeography: Arctic
Status: Rare in Canada and the Canadian Arctic.
TNC Global Ranks: G3G4
Habitat: Moist tundra.

Scirpus maritimus var. paludosus = S. maritimus

Saxifraga stellaris

Scirpus maritimus L.
(Scirpus maritimus var. paludosus (A. Nels.)
Kukenth., Scirpus paludosus A. Nels.)

CYPERACEAE

Reference: Cody 1979, Porsild & Cody 1980, à
Hultén & Fries 1986; DAO (Photo). Ao
Phytogeography: Prairie Bw ASD

Status: Rare in Newfoundland and Ontario.
TNC Global Ranks: G5
Habitat: Salt plains.

OS™.

Scirpus paludosus = S. maritimus

-
+0... |.
Scirpus pumilus ssp. rollandii = S. rollandii

Scirpus maritimus
Scirpus pumilus var. rollandii = S. rollandii

Scirpus rollandii Fern.
(Trichophorum pumilum auct. non (Vahl) Schinz
& Thellung, Scirpus pumilus var. rollandii (Fern.)
Beetle, Scirpus pumilus ssp. rollandii (Fern.)
Raymond)
CYPERACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO (Photo).
Phytogeography: Boreal
Status: Rare in the Yukon Territory, Quebec,
Saskatchewan, British Columbia, and Canada.
TNC Global Ranks: G5
TNC Canada Ranks: N2
Habitat: Marly lake shores and hot springs. Scirpus rollandii

15

Scirpus rufus (Huds.) Schrad. var. neogaeus Fern.
(Blysmus rufus (Huds.) Link)
CYPERACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN, DAO.
Phytogeography: Boreal
Status: Rare in Prince Edward Island, Nova
Scotia, Ontario, Manitoba, Saskatchewan,
Alberta, and the Canadian Arctic.
TNC Global Ranks: G5
Habitat: Wet river banks and saline meadows.
Comment: Disjunct. Scirpus rufus neogaeus

Sedum rosea (L.) Scop.
(Rhodiola rosea L.)
CRASSULACEAE
Reference: Porsild 1964, Hultén 1968, Hultén &
Fries 1986; CAN.
Phytogeography: Boreal
Status: Rare in the Canadian Arctic.
TNC Global Ranks: G5
Habitat: Cliffs and ledges near the sea.

Sedum rosea

Senecio conterminus, see S. ogotorukensis

Senecio eremophilus Richards.
ASTERACEAE
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Prairie
TNC Global Ranks: G4
Habitat: Woodland meadows and disturbed areas.

Senecio eremophilus

76

Senecio ogotorukensis Packer
(Senecio conterminus Greenm. sensu Hultén pro
parte)
ASTERACEAE
Reference: Hultén 1968, Cody (unpublished).
Phytogeography: Arctic-alpine
Status: Rare in British Columbia.
Habitat: Eroding alpine slopes.
Comment: New to the NWT flora since Porsild &
Cody (1980).

Senecio ogotorukensis

Senecio sheldonensis Porsild

ASTERACEAE

Reference: Cody 1979, Porsild & Cody 1980; à
DAO. So
Phytogeography: Boreal Bw ASD

Status: Rare in British Columbia.
TNC Global Ranks: G2

TNC Canada Ranks: N2
Habitat: Subalpine meadows.
Comment: Endemic.

mL Se
“1

|
|
2 AR EE

Senecio sheldonensis

Smelowskia calycina (Steph. ex Willd.) C.A. Mey.
var. media Drury & Rollins
BRASSICACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Arctic-alpine
Status: Rare in Canada and the Canadian Arctic.
TNC Global Ranks: G4T?
TNC Canada Ranks: N3T2
Habitat: Stoney slopes and lakeshores.
Comment: Endemic.

Solidago graminifolia var. major = Euthamia Smelowskia calycina media
graminifolia var. graminifolia

TT

Sparganium eurycarpum Engelm. ex Gray
SPARGANIACEAE à
Reference: Cody 1979, Porsild & Cody 1980. Ko
Phytogeography: Aquatic
Status: Rare in Newfoundland.
TNC Global Ranks: G5
Habitat: Shallow ponds and sloughs.

Sparganium eurycarpum

Spartina gracilis Trin.
POACEAE à
Reference: Cody 1979, Porsild & Cody 1980; Ao
DAO.
Phytogeography: Prairie
TNC Global Ranks: G5
Habitat: Salt plains.
Comment: Disjunct.

Spartina gracilis

Spartina pectinata Link
POACEAE à
Reference: Cody 1979, Porsild & Cody 1980; Do
DAO (Photo).
Phytogeography: Prairie
Status: Rare in Alberta.
TNC Global Ranks: GS
Habitat: Salt plains.
Comment: Disjunct.

Spartina pectinata

78

Spergularia marina (L.) Griseb.
CARYOPHYLLACEAE à
Reference: Cody 1979, Porsild & Cody 1980; So
CAN, DAO.

Phytogeography: Prairie

Status: Rare in Ontario and Alberta.
TNC Global Ranks: G4G5Q
Habitat: Salt plains.

Comment: Disjunct.

Spergularia marina

Stellaria umbellata Turcz. ex Kar. & Kir.
CARYOPHYLLACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; DAO. AE
Phytogeography: Montane
Status: Rare in the Yukon Territory, Alberta,
British Columbia, and Canada.
TNC Global Ranks: G5
TNC Canada Ranks: N2
Habitat: Moist alpine slopes.
Comment: Widely separated populations.

Stellaria umbellata

Stipa curtiseta (A.S. Hitchc.) Barkworth
(Stipa spartea Trin. var. curtiseta A.S. Hitchc.) à
POACEAE Ko
Reference: Cody 1979, Porsild & Cody 1980;
DAO.
Phytogeography: Prairie
Habitat: Grasslands.
Comment: Disjunct.

Stipa spartea var. curtiseta = S. curtiseta

Stipa curtiseta

Te

Stipa viridula Trin.
POACEAE à
Reference: Cody 1979, Porsild & Cody 1980; Ko
DAO.
Phytogeography: Prairie
TNC Global Ranks: G4
Habitat: Grasslands.

Stipa viridula

Symphoricarpos albus (L.) Blake

CAPRIFOLIACEAE N
Reference: Cody 1979, Porsild & Cody 1980; So
CAN, DAO. By HD
Phytogeography: Boreal CS #4

TNC Global Ranks: G5
Habitat: Grasslands and aspen woods.

Symphoricarpos albus

Synthyris borealis Pennell
SCROPHULARIACEAE à
Reference: Hultén 1968, Cody 1979, Porsild & Ao
Cody 1980; DAO.

Phytogeography: Montane

TNC Global Ranks: G3G4

Habitat: Alpine cliffs, shale slopes, and heathy
slopes.

Comment: Endemic.

Synthyris borealis

80

Tanacetum bipinnatum (L.) Schultz-Bip. ssp.
huronense (Nutt.) Breitung
(Tanacetum huronense Nutt.)
ASTERACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; CAN.
Phytogeography: Boreal
Status: Rare in the Yukon Territory, Manitoba,
Saskatchewan, Alberta, and British Columbia.
TNC Global Ranks: G5T4
Habitat: Sandy river banks.

Tanacetum bipinnatum huronense
Tanacetum huronense = T. bipinnatum ssp.
huronense

Thalictrum sparsiflorum Turcz. ex Fisch. & C.A.
Mey. var. richardsonii (Gray) Boivin
RANUNCULACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN, DAO.
Phytogeography: Boreal
Status: Rare in Ontario.
TNC Global Ranks: GST5
Habitat: River banks.

Thellungiella salsuginea = Arabidopsis salsuginea
Thalictrum sparsiflorum

Thelypteris phegopteris = Phegopteris connectilis richardsonii
Tillaea aquatica = Crassula aquatica

Trichophorum pumilum = Scirpus rollandii

Vaccinium cespitosum Michx.
ERICACEAE
Reference: Hultén 1968, Cody 1979, Porsild &
Cody 1980; CAN.
Phytogeography: Boreal
Status: Rare in Nova Scotia and Manitoba.
TNC Global Ranks: G5
Habitat: Alpine herbmats.

Vaccinium cespitosum

81

Vaccinium membranaceum Dougl. ex Torr.
ERICACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN.
Phytogeography: Montane
Status: Rare in Ontario.
TNC Global Ranks: G5
Habitat: Alpine herbmats.

Valeriana dioica L. var. sylvatica S. Wats.
(Valeriana septentrionalis Rydb.)
VALERIANACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Boreal
Status: Rare in New Brunswick and
Newfoundland.
TNC Global Ranks: GST?
Habitat: Fens and lake shores.

Valeriana septentrionalis = V. dioica var.
sylvatica

Viola canadensis var. corymbosa = V. canadensis
var. rugulosa

Viola canadensis L. var. rugulosa (Greene) C.L.
Hitchc.
(Viola rugulosa Greene, Viola canadensis var.
corymbosa Nutt. ex Torr. & Gray)
VIOLACEAE
Reference: Cody 1979, Porsild & Cody 1980;
CAN, DAO.
Phytogeography: Montane
Status: Rare in the Yukon Territory.
TNC Global Ranks: GST?

Habitat: Woodlands along streams and hot springs.

Viola rugulosa = V. canadensis var. rugulosa

82

Vaccinium membranaceum

Valeriana dioica sylvatica

Viola canadensis rugulosa

Viola selkirkii Pursh ex Goldie
VIOLACEAE
Reference: Hultén 1968, Hultén & Fries 1986,
Cody (unpublished).
Phytogeography: Boreal
Status: Rare in the Canadian Arctic, Yukon
Territory, Newfoundland, Manitoba, and Alberta.
Habitat: Moist thickets, woods, fens, and alpine
tundra.
Comment: New to the NWT flora since Porsild &
Cody (1980).

Viola selkirkii

Viscaria alpina = Lychnis alpina var. alpina

Zostera marina L.
ZOSTERACEAE
Reference: Cody 1979, Porsild & Cody 1980,
Hultén & Fries 1986; DAO.
Phytogeography: Coastal
Status: Rare in Ontario, Manitoba, and the
Canadian Arctic.
TNC Global Ranks: G5
Habitat: Sheltered tidal flats.

Zostera marina

83

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REFERENCES

Aiken, S.G. and S.J. Darbyshire. 1990.
Fescue Grasses of Canada.
Biosystematics Research Centre,
Research Branch, Agriculture
Canada. Publication 1844/E.

Argus, G.W. 1973. The Genus Salix in
Alaska and the Yukon. National
Museum of Natural Sciences.
Publications in Botany. No.2,
Ottawa, Ontario. 279 pp.

Argus, G.W., & J. McNeill. 1975. The
conservation of evolutionary centres
in Canada. Pp. 130-141, in J.S.
Maini & J. Carlyle. Conservation in
Canada - A conspectus. Environment
Canada, Publ. 1340, Ottawa.

Argus, G.W., K.M. Pryer, D.J. White &
C.J. Keddy (eds). 1982-1987. Atlas
of the Rare Vascular Plants of
Ontario. 4 Parts. National Museum
of Natural Sciences, Ottawa.

Argus, G.W. 1986. Salix raupii, Raup’s
Willow, New to the Flora of Alberta
and the Northwest Territories.
Canadian Field-Naturalist.
100(3):386-388.

Argus, G.W., & K.M. Pryer. 1990. Rare
Vascular Plants in Canada: Our
Natural Heritage. Canadian Museum
of Nature, Ottawa.

Bouchard, A., D. Barabé, M. Dumais, and
S. Hay. 1983. The Rare Vascular
Plants of Québec. Syllogeus 48. 75

Pp.

Bouchard, A., S. Hay, L. Brouillet, M.
Jean, and I. Saucier. 1991. The Rare
Vascular Plants of the Island of
Newfoundland. Syllogeus 65. 165

Pp.

Cantino, P.D. 1981. Change of Status for
Physostegia virginiana var.
ledinghamii (Labiatae) and Evidence
for a Hybrid Origin. Rhodora. 83:
111-117.

Chuang, T.I. and L.R. Heckard. 1992. A
Taxonomic Revision of Orthocarpus
(Scrophulariaceae - Tribe
Pediculareae). Systematic Botany.
17(4): 560-582.

Cody, W.J. 1979. Vascular Plants of
Restricted Range in the Continental
Northwest Territories. Syllogeus 23.
National Museum of Natural
Sciences, Ottawa.

Cody, W.J. and D.M. Britton. 1989. Ferns
and fern allies of Canada. Research
Branch Agriculture Canada. Ottawa,
Canada. Publication 1829/E.

Cody, W.f;° Scotter): Gow and “S.C.
Zoltai. 1992. Vascular Plant Flora of
the Melville Hills Region, Northwest
Territories. Canadian Field
Naturalist. 106(2):87-99.

Cody, W.J. Additions and Range
Extensions to the vascular plant Flora
of the continental Northwest
Territories, Canada. Canadian Field-
Naturalist. Unpublished.

85

Cody,. W.J.;, Darbyshire, S.J., and C.E:
Kennedy. 1990. A Bluegrass, Poa
pseudoabbreviata Roshev., New to
the Flora of Canada, and Some
Additional Records from Alaska.
Canadian Field-Naturalist. 104(4):
589-591.

Darbyshire, S.J. and J. Cayouette. 1989.
The Biology of Canadian weeds. 92.
Danthonia spicata (L.) Beauv. in
Roem. & Schult. Can. J. Plant Sci.
69:1217-1233.

Day, R., and P.M. Catling. 1991. The Rare
Vascular Plants of Prince Edward
Island. Syllogeus 67. 65 pp.

Douglas, G.W., G.W. Argus, H.L.
Dickson, & D.F. Brunton. 1981. The
Rare Vascular Plants of the Yukon.
Syllogeus 28. National Museum of
Natural Sciences, Ottawa.

Finkelstein, M. 1990. National Parks
System Plan. Environment Canada,
Ottawa. 110 pp.

Flora of North America Editorial
Committee. 1993. Flora of North
America, Volume 2. Oxford
University Press, New York.

Halfyard, B. ed. 1993. Canadian Council on
Ecological Areas Newsletter. 8:15.

Harms. V.L., P.A. Ryan, and J.A.
Haraldson. 1992. The Rare and
Endangered Native Vascular Plants
of Saskatchewan. The W.P. Fraser
Herbarium, Department of Crop
Science and Plant Ecology,
University of Saskatchewan,
Saskatoon. Looseleaf.

86

Harris, J.G. 1985. A revision of the genus
Braya (Cruciferae) in North
America. Ph.D. Thesis. University
of Alberta, Edmonton. 250 pp.
Unpublished.

Harris, S.A. 1992. Status report on the
Yukon Aster, Aster yukonensis.
Committee on the Status of
Endangered Wildlife in Canada,
Canadian Wildlife Service, Ottawa.
Unpublished.

Hinds, H. 1983. The Rare Vascular Plants
of New Brunswick. Syllogeus 50.
National Museum of Natural
Sciences, Ottawa.

Holmgren, P.K., Holmgren, N.H. & L.C.
Barnett. 1990. Index Herbariorum,
Part 1: The herbaria of the world.
8th edition. Pp. 693. New York
Botanical Garden, New York.

Hultén, E. 1973. Supplement to Flora of
Alaska and Neighboring Territories.
A Study in the Flora of Alaska and
the Transberingian Connection.
Botaniska Notiser, vol. 126:459-512.

Hultén, E. & M. Fries. 1986. Atlas of
North European Vascular Plants
North of the Tropic of Cancer. 3
Volumes. Koeltz Scientific Books,
Kônigstein, Federal Republic of
Germany. 1172 pp.

Hultén, E. 1968. Flora of Alaska and
Neighboring Territories: A Manual
of the Vascular Plants. Stanford
University Press, Stanford,
California, 1008 pp.

Nee ee ens a ie I et a ee ce

Kartesz, J.T. 1994. A Synonymized
checklist of the Vascular Flora of the
United States, Canada, and
Greenland. Volume I & II. Second
Edition. Timber Press. Portland,
Oregon.

Kellogg, E.A. 1985. A Biosystematic Study
of the Poa secunda complex. Journal
of the Arnold Arboretum. 66:201-
242.

Lavoie, G. 1992. Plantes vasculaires
susceptibles d’étre désignées
menacées ou vulnérables au Québec.
Ministère du l’environnement.
Direction de la conservation et du
patrimoine écologique. Division de la
diversité biologique. Envirodoq
EN910479. 180 pp.

Lucas, G. and H. Synge. 1978. The IUCN
Plant Red Data Book. IUCN,
Morges, Switzerland. 540 pp.

Maher, R.V., D.J. White, G.W. Argus &
P.A. Keddy. 1978. The Rare
Vascular Plants of Nova Scotia.
Syllogeus 18. National Museum of
Natural Sciences, Ottawa.

McJannet, C.L., G.W. Argus, S.A. Edlund,
& J. Cayouette. 1993. Rare Vascular
Plants in the Canadian Arctic.
Syllogeus 72. Canadian Museum of
Nature, Ottawa.

Mulligan, G.A. and W.J. Cody. 1968.
Draba norvegica, disjunct to the
Mackenzie District, Northwest

Territories, Canada. Canadian
Journal of Botany. Vol. 46. 1334-
1335:

Mulligan, G.A. Taxonomy of the genus
Arabis (Brassicaceae) in Canada,
Alaska, and Greenland . Rhodora
(unpublished) .

Nettleship, D.N. and P.A. Smith. 1975.
Ecological Sites in Northern Canada.
Canadian Committee for the
International Biological Programme
conservation Terrestrial - Panel 9.
Canadian Wildlife Service, Ottawa.

New Parks North, March 1993, Government
of Canada, Northwest Territories and
Yukon.

Packer, J.G., and C.E. Bradley. 1984. A
Checklist of the Rare Vascular Plants
in Alberta. Provincial Museum of
Alberta, Natural History Occasional
Paper S112 ‘pp:

Porsild, A.E. 1964. Illustrated flora of the
Canadian Arctic Archipelago. 2nd
edition revised. National Museum of
Canada. Bulletin 146, 218 pp.

Porsild;s AE, 0 & “WJ. «Cody. 1980.
Vascular Plants of Continental
Northwest ‘Territories, Canada.
National Museum of Natural
Sciences, Ottawa. 667 pp.

Rollins, R.C. 1993. the Cruciferae of
Continental North America.
Systematics of the Mustard family
from the Arctic to Panama. Stanford
University Press. Stanford,
California.

Raup, H.M. 1935. Botanical investigations
in Wood Buffalo Park. National
Museum of Canada, Bull. 74. 174

Pp.

87

Straley GB. “Reb, Taylor, d&erGaw,.
Douglas. 1985. The Rare Vascular
Plants of British Columbia. National
Museum of Natural Sciences,
Ottawa, Syllogeus 59. 165 pp.

Straley, G.B. 1986. Wild Bergamot,
Monarda fistulosa, (Lamiaceae),
New to the Northwest Territories.
Canadian Field Naturalist. 100(3):
380-381.

Taschereau, P.M. 1982. The status of
ecological reserves in Canada.
Institute for Resource and
Environmental Studies Research
Paper 82-01, Dalhousie University,
Halifax, Nova Scotia. 116. pp

The Nature Conservancy. 1988. Element
state tracking database, Central
Scientific Databases. The Nature
Conservancy, Arlington, Virginia.

Wagner Jr., W.H. and F.S. Wagner. 1990.
Notes on the Fan-Leaflet Group of
Moonworts in North America with
Descriptions of Two New Members.
American Fern Journal, 80(3):73-81.

White, D.J., & K.L. Johnson. 1980. The
Rare Vascular of Plants of Manitoba.
National Museum of Natural
Sciences, Ottawa, Syllogeus 27. 52

Pp.

Wolf, S.J. & J. McNeill. 1986. Synopsis
and achene morphology of
Polygonum section Polygonum

(Polygonaceae) in Canada. Rhodora.
88:457-479.

88

APPENDIX I

FAMILY LIST OF THE RARE VASCULAR PLANTS IN THE
NORTHWEST TERRITORIES

ADIANTACEAE
Cryptogramma sitchensis
Cryptogramma stelleri

ADOXACEAE
Adoxa moschatellina

ALISMATACEAE
Alisma plantago-aquatica var. americanum

APIACEAE
Angelica lucida
Osmorhiza depauperata
Podistera macounii

APOCYNACEAE
Apocynum cannabinum var. glaberrimum

ARACEAE
Acorus americanus

ASPLENIACEAE
Asplenium trichomanes-ramosum

ASTERACEAE
Agoseris aurantiaca
Anaphalis margaritacea
Antennaria friesiana ssp. alaskana
Arnica amplexicaulis
Arnica cordifolia
Arnica mollis
Artemisia alaskana
Artemisia ludoviciana ssp. ludoviciana
Aster nahanniensis
Aster pauciflorus
Aster yukonensis
Cirsium drummondii

Cirsium foliosum

Erigeron acris var. debilis

Erigeron alpiniformis

Erigeron yukonensis

Euthamia graminifolia var. graminifolia
Grindelia squarrosa

Haplopappus uniflorus ssp. uniflorus
Hieracium albiflorum

Senecio eremophilus

Senecio ogotorukensis

Senecio sheldonensis

Tanacetum bipinnatum ssp. huronense

BALSAMINACEAE
Impatiens capensis

BORAGINACEAE
Eritrichium splendens
Mertensia drummondii
Mertensia paniculata var. alaskana

BRASSICACEAE
Arabidopsis salsuginea
Arabis holboellii var. pinetorum
Arabis lyrata lyrata
Braya pilosa
Cardamine microphylla
Descurainia pinnata ssp. brachycarpa
Draba albertina
Draba incerta
Draba norvegica
Draba ogilviensis
Draba porsildii
Lesquerella calderi
Rorippa barbareifolia
Rorippa crystallina
Smelowskia calycina var. media

89

CALLITRICHACEAE
Callitriche anceps

CAPRIFOLIACEAE
Symphoricarpos albus

CARYOPHYLLACEAE
Cerastium cerastioides
Cerastium maximum
Lychnis alpina var. alpina
Minuartia macrocarpa
Minuartia yukonensis
Spergularia marina
Stellaria umbellata

CHENOPODIACEAE
Atriplex gmelinii
Atriplex subspicata
Chenopodium rubrum
Salicornia rubra

CISTACEAE
Hudsonia tomentosa

CORNACEAE
Cornus suecica

CRASSULACEAE
Crassula aquatica
Sedum rosea

CYPERACEAE
Carex arcta
Carex crawfordii
Carex deweyana
Carex duriuscula
Carex eleusinoides
Carex heleonastes
Carex laxa
Carex mackenziei
Carex peckii
Carex phaeocephala
Carex prairea
Carex retrorsa

90

Carex rufina

Carex sychnocephala
Carex trisperma

Eleocharis compressa
Rhynchospora alba

Scirpus maritimus

Scirpus rollandii

Scirpus rufus var. neogaeus

DRYOPTERIDACEAE
Dryopteris carthusiana
Dryopteris expansa

ELATINACEAE
Elatine triandra

ERICACEAE
Vaccinium cespitosum
Vaccinium membranaceum

FABACEAE
Astragalus canadensis
Oxytropis podocarpa
Oxytropis scammaniana
Oxytropis sericea var. spicata

GENTIANACEAE
Gentiana affinis
Gentianopsis detonsa ssp. detonsa
Gentianopsis macounii

HALORAGACEAE
Myriophyllum alterniflorum

HIPPURIDACEAE
Hippuris montana

ISOETACEAE
Isoetes lacustris

JUNCACEAE
Juncus dudleyi
Juncus stygius ssp. americanus
Juncus trifidus

Juncus vaseyi
Luzula rufescens

LAMIACEAE
Agastache foeniculum
Lycopus uniflorus
Monarda fistulosa var. menthifolia
Physostegia ledinghamii

LOBELIACEAE
Lobelia dortmanna

NAJADACEAE
Najas flexilis

NYMPHAEACEAE
Nuphar lutea ssp. polysepala
Nymphaea tetragona

ONAGRACEAE
Epilobium hornemannii ssp. hornemannii
Epilobium leptophyllum

OPHIOGLOSSACEAE
Botrychium minganense
Botrychium multifidum
Botrychium pinnatum
Botrychium simplex
Botrychium spathulatum

ORCHIDACEAE
Liparis loeselii
Malaxis paludosa
Platanthera orbiculata var. orbiculata

PAPAVERACEAE
Papaver mcconnellii

POACEAE
Agrostis exarata
Avenula hookeri
Calamagrostis holmii
Danthonia spicata
Deschampsia cespitosa ssp. alpina

Distichlis spicata

Elymus canadensis

Festuca lenensis

Festuca vivipara ssp. glabra
Koeleria asiatica
Phragmites australis

Poa abbreviata ssp. jordalii
Poa porsildii

Poa pseudoabbreviata

Poa secunda

Puccinellia kurilensis
Puccinellia poacea

Spartina gracilis

Spartina pectinata

Stipa curtiseta

Stipa viridula

POLEMONIACEAE
Phlox richardsonii ssp. alaskensis
Phlox richardsonii ssp. richardsonii

POLYGONACEAE
Polygonum amphibium var. emersum
Polygonum caurianum ssp. hudsonianum
Rumex acetosa ssp. alpestris

PORTULACACEAE
Claytonia megarhiza

POTAMOGETONACEAE
Potamogeton foliosus var. foliosus
Potamogeton illinoensis
Potamogeton natans
Potamogeton obtusifolius
Potamogeton robbinsii
Potamogeton subsibiricus
Ruppia cirrhosa

PRIMULACEAE
Douglasia arctica
Douglasia ochotensis
Primula eximia

91

PTERIDACEAE
Pellaea glabella ssp. occidentalis

PYROLACEAE
Chimaphila umbellata ssp. occidentalis

RANUNCULACEAE
Caltha palustris var. palustris
Ranunculus allenii
Ranunculus hispidus var. nitidus
Ranunculus pensylvanicus
Ranunculus rhomboideus
Ranunculus turneri
Thalictrum sparsiflorum var. richardsonii

ROSACEAE
Chamaerhodos erecta ssp. nuttallii
Dryas integrifolia ssp. chamissonis
Luetkea pectinata
Potentilla tabernaemontani
Prunus virginiana
Rosa blanda
Sanguisorba officinalis

SALICACEAE
Salix chamissonis
Salix ovalifolia var. arctolitoralis
Salix raupii
Salix sphenophylla

SARRACENIACEAE
Sarracenia purpurea

SAXIFRAGACEAE
Heuchera richardsonii
Saxifraga eschscholtzii
Saxifraga ferruginea
Saxifraga stellaris

SCROPHULARIACEAE
Bartsia alpina
Castilleja yukonis
Limosella aquatica
Mimulus guttatus

92

Orthocarpus luteus
Pedicularis macrodonta
Pedicularis oederi
Penstemon gormanii
Synthyris borealis

SPARGANIACEAE
Sparganium eurycarpum

THELYPTERIDACEAE
Phegopteris connectilis

VALERIANACEAE
Valeriana dioica var. sylvatica

VIOLACEAE
Viola canadensis var. rugulosa
Viola selkirkii

ZOSTERACEAE
Zostera marina

RE ER ef, ee a a ee ee nl

PHYTOGEOGRAPHICAL LIST OF RARE VASCULAR PLANTS IN

APPENDIX II

THE NORTHWEST TERRITORIES

AQUATIC

Alisma plantago-aquatica var. americanum

Callitriche anceps

Crassula aquatica

Elatine triandra

Isoetes lacustris

Limosella aquatica

Lobelia dortmanna

Myriophyllum alterniflorum

Najas flexilis

Nuphar lutea ssp. polysepala
Nymphaea tetragona

Polygonum amphibium var. emersum
Potamogeton foliosus var. foliosus
Potamogeton illinoensis
Potamogeton natans

Potamogeton obtusifolius
Potamogeton robbinsii
Potamogeton subsibiricus

Ruppia cirrhosa

Sparganium eurycarpum

ARCTIC
Braya pilosa
Calamagrostis holmii
Carex rufina
Draba norvegica
Dryas integrifolia ssp. chamissonis
Erigeron alpiniformis
Festuca vivipara ssp. glabra
Gentianopsis detonsa ssp. detonsa
Mertensia drummondii
Oxytropis podocarpa

Phlox richardsonii ssp. richardsonii

Puccinellia poacea

Salix ovalifolia var. arctolitoralis
Salix sphenophylla

Saxifraga eschscholtzii

Saxifraga stellaris

ARCTIC-ALPINE
Antennaria friesiana ssp. alaskana
Artemisia alaskana
Bartsia alpina
Cardamine microphylla
Carex laxa
Cerastium cerastioides
Cerastium maximum
Deschampsia cespitosa ssp. alpina
Douglasia arctica
Douglasia ochotensis
Eritrichium splendens
Festuca lenensis
Juncus trifidus
Koeleria asiatica
Lychnis alpina var. alpina
Minuartia macrocarpa
Minuartia yukonensis
Pedicularis oederi
Phlox richardsonii ssp. alaskensis
Podistera macounii
Potentilla tabernaemontani
Ranunculus allenii
Ranunculus turneri
Rumex acetosa ssp. alpestris

93

Salix chamissonis
Senecio ogotorukensis
Smelowskia calycina var. media

BOREAL
Acorus americanus
Adoxa moschatellina
Agrostis exarata
Anaphalis margaritacea
Apocynum cannabinum var. glaberrimum
Arabis holboellii var. pinetorum
Arabis lyrata lyrata
Asplenium trichomanes-ramosum
Aster nahanniensis
Astragalus canadensis
Botrychium minganense
Botrychium multifidum
Botrychium simplex
Botrychium spathulatum
Caltha palustris var. palustris
Carex arcta
Carex crawfordii
Carex deweyana
Carex heleonastes
Carex peckil
Carex prairea
Carex retrorsa
Carex sychnocephala
Carex trisperma
Castilleja yukonis
Chimaphila umbellata ssp. occidentalis
Cornus suecica
Danthonia spicata
Descurainia pinnata ssp. brachycarpa
Dryopteris carthusiana
Elymus canadensis
Epilobium leptophyllum
Erigeron yukonensis
Euthamia graminifolia var. graminifolia
Heuchera richardsonii
Hudsonia tomentosa
Impatiens capensis
Juncus dudleyi
Juncus stygius ssp. americanus

94

Juncus vaseyi

Liparis loeselii

Luzula rufescens

Lycopus uniflorus

Malaxis paludosa

Mertensia paniculata var. alaskana
Mimulus guttatus

Monarda fistulosa var. menthifolia
Osmorhiza depauperata
Pedicularis macrodonta

Pellaea glabella ssp. occidentalis
Physostegia ledinghamii
Platanthera orbiculata var. orbiculata
Prunus virginiana

Ranunculus hispidus var. nitidus
Ranunculus pensylvanicus
Rhynchospora alba

Rorippa barbareifolia

Rorippa crystallina

Rosa blanda

Salix raupii

Sanguisorba officinalis

Sarracenia purpurea

Scirpus rollandii

Scirpus rufus var. neogaeus
Sedum rosea

Senecio sheldonensis
Symphoricarpos albus

Tanacetum bipinnatum ssp. huronense
Thalictrum sparsiflorum var. richardsonii
Vaccinium cespitosum

Valeriana dioica var. sylvatica
Viola selkirkii

COASTAL
Atriplex gmelinii
Carex mackenziei
Polygonum caurianum ssp. hudsonianum
Puccinellia kurilensis
Zostera marina

COSMOPOLITAN
Cryptogramma stelleri
Phegopteris connectilis
Phragmites australis
Poa secunda

MONTANE
Agoseris aurantiaca
Angelica lucida
Arnica amplexicaulis
Arnica cordifolia
Arnica mollis
Aster yukonensis
Botrychium pinnatum
Carex eleusinoides
Carex phaeocephala
Cirsium foliosum
Claytonia megarhiza
Cryptogramma sitchensis
Draba albertina
Draba incerta
Draba ogilviensis
Draba porsildii
Dryopteris expansa
Epilobium hornemannii ssp. hornemannii
Erigeron acris var. debilis
Hieracium albiflorum
Hippuris montana
Lesquerella calderi
Luetkea pectinata
Oxytropis scammaniana
Papaver mcconnellii
Penstemon gormanii
Poa abbreviata ssp. jordalii
Poa porsildii
Poa pseudoabbreviata
Primula eximia
Saxifraga ferruginea
Stellaria umbellata
Synthyris borealis
Vaccinium membranaceum
Viola canadensis var. rugulosa

PRAIRIE
Agastache foeniculum
Arabidopsis salsuginea

Artemisia ludoviciana ssp. ludoviciana

Aster pauciflorus

Atriplex subspicata

Avenula hookeri

Carex duriuscula
Chamaerhodos erecta ssp. nuttallii
Chenopodium rubrum
Cirsium drummondii
Distichlis spicata

Eleocharis compressa
Gentiana affinis

Gentianopsis macounii
Grindelia squarrosa
Haplopappus uniflorus ssp. uniflorus
Orthocarpus luteus

Oxytropis sericea var. spicata
Ranunculus rhomboideus
Salicornia rubra

Scirpus maritimus

Senecio eremophilus

Spartina gracilis

Spartina pectinata

Spergularia marina

Stipa curtiseta

Stipa viridula

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APPENDIX III

EXCLUDED TAXA

This list includes excluded taxa that were considered for rare status but which did not
meet our criteria for rarity. The reasons for exclusion are indicated by the following codes:

H - Hybrid.

I - Introduced.

L - Locality Error.

M - Misidentified.

T - Taxonomic Problem.

W - Widespread.

Abies lasiocarpa (Hook.) Nutt.
Actaea rubra (Ait.) Willd.

Agoseris glauca (Pursh) Raf. ssp. scorzonerifolia (Schrad.)

Piper = A. glauca var. dasycephala

Agoseris glauca (Pursh) Raf. var. dasycephala (Torr. &

Gray) Jepson

Alyssum americanum Greene = A. obovatum

Anemone canadensis L.
Anemone drummondii S. Wats.
Anemone narcissiflora L.

Antennaria alborosea Porsild ex M.P. Porsild = A. rosea

ssp. rosea
Antennaria alpina (L.) Gaertn.

Taxa found in the flora of the Northwest Territories (Porsild &
Cody 1980) but were later identified as hybrids.

Native North American taxa which have been introduced into the
Northwest Territories.

Taxa that were considered for rare status as a result of incorrect
locality data.
result of

Taxa that were considered for rare status as a

identification errors.

Taxa whose distribution data were uncertain as a result of
taxonomy which made the identification of specimens unreliable.

Taxa that proved to be too widely distributed or present in large
numbers.

Antennaria ekmaniana Porsild = A. alpina
Antennaria elegans Porsild = A. rosea ssp. confinis
Antennaria friesiana (Trautv.) Ekman ssp.

compacta (Malte) Hultén

Antennaria glabrata (J. Vahl) Greene = A.
monocephala

Antennaria incarnata Porsild = A. rosea ssp.
confinis

Antennaria monocephala DC.

Antennaria neglecta Greene

Antennaria pedunculata Porsild = A. alpina
Antennaria philonipha Porsild = A. monocephala
Antennaria pygmaea Fern. = A. alpina

Antennaria campestris Rydb. = A. neglecta
Antennaria canescens (Lange) Malte = A. alpina

Antennaria crymophila Porsild = A. friesianna ssp.

compacta
Antennaria densifolia Porsild

L££ S222=22= = = 225

Antennaria rosea Greene ssp. confinis (Greene)
Bayer

Antennaria rosea Greene ssp. rosea

Antennaria sornborgeri Fern. = A. alpina
Antennaria stolonifera Porsild = A. alpina

97

LLLLLELLLLLELLS LLLELLELELS ELLES SF FSS FES SF FS FESS SSE FS

Antennaria subcanescens Ostenf. ex Malte = A. friesiana
ssp. compacta

Antennaria subviscosa Fern. = A. rosea ssp. confinis
Antennaria ungavensis (Fern.) Malte = A. alpina
Apocynum androsaemifolium L.

Arabis alpina L.

Arabis lyrata L. var. kamchatica Fisch. ex DC.

Aralia nudicaulis L.

Arctagrostis angustifolia Nash = A. latifolia ssp.
arundinacea

Arctagrostis latifolia (R. Br.) Griseb.

Arctagrostis latifolia (R. Br.) Griseb. ssp. arundinacea
(Trin.) Tzvelev.

Arctagrostis latifolia (R. Br.) Griseb. ssp. nahanniensis
Porsild = A. latifolia

Arenaria capillaris Poir. ssp. capillaris

Arenaria capillaris Poir. var. nardifolia (Ledeb.) Regel =
A. capillaris ssp. capillaris

Argentina anserina (L.) Rydb.

Argentina egedii (Wormskj.) Rydb. ssp. egedii

Armeria maritima (P. Mill.) Willd. ssp. arctica (Cham.)
Hultén = A. maritima ssp. purpurea

Armeria maritima (P. Mill.) Willd. ssp. purpurea (W.D.J.

Koch) A. & D. Léve

Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire
Arnica chamissonis Less. ssp. incana (Gray) Maguire
Arnica frigida C.A. Mey. ex Iljin ssp. frigida

Arnica griscomii Fern. ssp. frigida (C.A. Mey. ex Iljin)
S.J. Wolf = A. frigida ssp. frigida

Arnica latifolia Bong.

Arnica lessingii (Torr. & Gray) Greene

Artemisia arctica Less. ssp. arctica

Artemisia campestris L.

Artemisia furcata Bieb. var. furcata

Artemisia hyperborea Rydb. = A. furcata var. furcata
Artemisia richardsoniana Bess. = A. campestris
Aster alpinus L. ssp. vierhapperi Onno = A. alpinus var.
vierhapperi

Aster alpinus L. var. vierhapperi (Onno) Cronq.

Aster borealis (Torr. & Gray) Prov.

Aster brachyactis Blake

Aster falcatus Lindl.

Aster franklinianus Rydb. = A. borealis

Aster pygmaeus Lindl. = A. sibiricus var. pygmaeus
Aster sibiricus L. var. pygmaeus (Lindl.) Cody

Aster spathulatus Lindl.

Astragalus aboriginorum Richards.

Astragalus adsurgens Pallas var. robustior Hook.
Astragalus agrestis Dougl. ex G. Don

Astragalus americanus (Hook.) M.E. Jones

Astragalus richardsonii Sheldon = A. aboriginorum

98

means £22225 LEE SE

tases

== LES == £222 = == EE FEE

Astragalus striatus Nutt. = A. adsurgens var.
robustior

Astragalus tenellus Pursh

Astragalus umbellatus Bunge

Athyrium filix-femina (L.) Roth var. cyclosorum
Rupr.

Atriplex glabriuscula Edmondston

Betula nana L.

Betula pumila L. var. glandulifera Regel

Bidens cernua L.

Botrychium lunaria (L.) Sw.

Botrychium virginianum (L.) Sw.

Botrychium virginianum (L.) Sw. ssp. europaeum
(Angstr.) Jav. = B. virginianum

Braya glabella Richards.

Braya glabella Richards. var. prostrata Harris ined.
Braya henyrae Raup

Braya humilis (C.A. Mey.) B.L. Robins. var.
ellesmerensis Harris ined.

Braya purpurascens (R. Br.) Bunge

Braya richardsonii (Rydb.) Fern. = B. humilis
Braya thorild-wulffii Ostenf.

Braya thorild-wulffii Ostenf. var. glabrata Harris
ined.

Bromus ciliatus L.

Bupleurum americanum Coult. & Rose
Calamagrostis chordorrhiza Porsild = C. stricta
ssp. inexpansa

Calamagrostis deschampsioides Trin.
Calamagrostis stricta (Timm) Koel. ssp. inexpansa
(Gray) C.W. Greene

Caltha natans Pallas ex Georgi

Caltha palustris L. var. arctica (R.Br.) Huth. = C.
palustris var. flabellifolia

Caltha palustris L. var. flabellifolia (Pursh) Torr.
& Gray

Campanula aurita Greene

Campanula lasiocarpa Cham.

Campanula rotundifolia L.

Cardamine oligosperma Nutt. var. kamtschatica
(Regel) Detling

Cardamine pensylvanica Muhl. ex Willd.
Cardamine umbellata Greene = C. oligosperma
var. kamtschatica

Carex adelostoma Krecz.

Carex albonigra Mackenzie

Carex arctogena H. Sm. = Carex capitata ssp.
arctogena

Carex atherodes Spreng.

Carex atratiformis Britt. ssp. raymondii (Calder)
Porsild = C. raymondii

= == 22222252 = = SS 225252 LS SSE SSSSSS FESSSS FZESZSE

Carex atrosquama Mackenzie

Carex bebbii (Bailey) Olney ex Fern.

Carex bicolor Bellardi ex All.

Carex bonanzensis Britt.

Carex capitata L. ssp. arctogena (H. Sm.) Hiitonen = C.
capitata L.

Carex filifolia Nutt.

Carex foenea Willd.

Carex franklinii Boott

Carex interior Bailey

Carex lasiocarpa Ehrh. var. americana Fern.

Carex livida (Wahlenb.) Willd. var. grayana (Dewey)
Fern. = C. livida var. radicaulis

Carex livida (Wahlenb.) Willd. var. radicaulis Paine
Carex loliacea L.

Carex macloviana d’Urv.

Carex michrochaeta Holm

Carex morrisseyi Porsild = C. adelostoma

Carex norvegica Retz. ssp. inserrulata Kalela

Carex oligosperma Michx.

Carex petricosa Dewey

Carex pyrenaica Wahlenb. ssp. micropoda (C.A. Mey.)
Hultén

Carex ramenskii Komarov

Carex rariflora (Wahlenb.) Sm. var. androgyna Porsild =
C. rariflora

Carex raymondii Calder

Carex richardsonii R. Br.

Carex rossii Boott

Carex sartwellii Dewey

Carex saxatilis L. var. miliaris (Michx.) Bailey = C.
saxatilis

Carex williamsii Britt.

Cassiope hypnoides (L.) D. Don = Harrimanella
hypnoides

Cassiope tetragona (L.) D. Don ssp. saximontana (Small)
Porsild = C. tetragona var. saximontana

Cassiope tetragona (L.) D. Don var. saximontana (Small)
C.L. Hitchc.

Castilleja hyperborea Pennell

Castilleja septentrionalis Lindl.

Cerastium arcticum Lange

Cerastium arvense L.

Cerastium regelii Ostenf.

Ceratophyllum demersum L.

Chenopodium glaucum L. ssp. salinum (Standl.) Aellen =
C. salinum

Chenopodium salinum Stand].

Chrysanthemum arcticum L. p.p. = Dendranthema
arcticum ssp. polare

Chrysosplenium wrightii Franch. & Savigny

3 SSeS £2 = 222 2222228

LLLLLLLLLLLLELLS == FEE FE

Cicuta bulbifera L.

Cicuta maculata L. var. angustifolia Hook.
Cinna latifolia (Trev. ex Goepp.) Griseb.
Circaea alpina L.

Claytonia tuberosa Pallas ex J.A. Schultes
Cnidium cnidiifolium (Turcz.) Schischkin
Coeloglossum viride (L.) Hartman var. virescens
(Muhl. ex Willd.) Luer

Collomia linearis Nutt.

Colpodium vahlianum (Liebm.) Nevski
Conioselinum cnidiifolium (Turcz.) Porsild =
Cnidium cnidiifolium

Coptis trifolia (L.) Salisb. groenlandica (Oeder)
Hultén

Corispermum hyssopifolium L. = C. nitidum
Corispermum nitidum auct. non Kit in J.A.
Schultes

Corydalis pauciflora (Steph.) Pers.

Crepis elegans Hook.

Cypripedium guttatum Sw.

Cystopteris montana (Lam.) Bernh. ex Desv.
Danthonia intermedia Vasey

Dendranthema arcticum (L.) Tzvelev ssp. polare
(Hultén) Heywood

Deschampsia cespitosa (L.) Beauv. ssp. glauca
(Hartman) Hartman

Deschampsia paramushirensis Honda
Deschampsia pumila (Griseb.) Ostenf. = D.
paramushirensis

Diapensia lapponica L.

Diapensia lapponica L. var. obovata F. Schmidt
Diapensia obovata (F. Schmidt) Nakai = D.
lapponica var. obovata

Dodecatheon frigidum Cham. & Schlecht.
Dodecatheon pulchellum (Raf.) Merr. ssp.
pauciflorum (Greene) Hultén

Draba allenii Fern. = D. lactea

Draba alpina L.

Draba aurea Vahl ex Hornem.

Draba borealis DC.

Draba crassifolia Graham

Draba lactea M.F. Adams

Draba lonchocarpa Rydb.

Draba longipes Raup

Draba macounii O.E. Schulz

Draba oligosperma Hook.

Draba palanderiana Kjellm.

Draba pilosa M.F. Adams ex DC. = D. alpina
Draba praealta Greene

Draba subcapitata Simm.

Drosera linearis Goldie

99

SÉLLLLLELLELS SSS S= SVISSSTSSSS SST SSS SSS SSE SF FHSS SESS SS=S

Dryas alaskensis Porsild = D. octopetala ssp. alaskensis
Dryas crenulata Juz. = D. integrifolia ssp. crenulata
Dryas hookeriana Juz. = D. octopetala ssp. hookeriana
Dryas integrifolia Vahl ssp. crenulata (Juz.) Scoggan
Dryas octopetala L. ssp. alaskensis (Porsild) Hultén
Dryas octopetala L. ssp. hookeriana (Juz.) Hultén
Dryas octopetala L. ssp. octopetala

Dryas octopetala L. var. punctata (Juz.) Hultén

Dryas punctata Juz. = D. octopetala var. punctata
Dryopteris disjuncta (Rupr.) Morton = Gymnocarpium
disjunctum

Dryopteris robertiana (Hoffmann) C. Christens. =
Gymnocarpium robertianum

Eleocharis uniglumis (Link) J.A. Schultes

Epilobium anagallidifolium Lam.

Epilobium arcticum Samuelsson

Epilobium ciliatum Raf.

Epilobium davuricum Fisch. ex Hornem.

Epilobium lactiflorum Hausskn.

Equisetum hyemale L. var. affine (Engelm.) A.A. Eat.
Erigeron grandiflorus Hook. ssp. arcticus Porsild
Erigeron hyperboreus Greene

Erigeron pallens Cronq. = E. purpuratus

Erigeron philadelphicus L.

Erigeron purpuratus Greene

Eriophorum alpinum L.

Eriophorum gracile W.D.J. Koch ex Roth

Eriophorum viridicarinatum (Engelm.) Fern.
Eritrichium aretioides (Cham.) A. DC.

Euphrasia arctica Lge.

Euphrasia subarctica Raup

Festuca prolifera (Piper) Fern. var. lasiolepis Fern.
Fragaria vesca L. ssp. americana (Porter) Staudt = F.
vesca var. americana

Fragaria vesca L. var. americana Porter

Galium brandegei Gray = G. trifidum ssp. subbiflorum
Galium kamtschaticum Steller ex J.A. & J.H. Schultes
Galium labradoricum (Wieg.) Wieg.

Galium tinctorium L. var. subbiflorum (Wieg.) Fern. =
G. trifidum ssp. subbiflorum

Galium trifidum L. ssp. subbiflorum (Wieg.) Piper
Galium triflorum Michx.

Gentiana glauca Pallas

Gentiana prostrata Haenke

Gentiana raupii Porsild

Gentiana tenella Rottb. = Gentianella tenella ssp. tenella
Gentianella tenella (Rottb.) Boerner ssp. tenella
Geranium richardsonii Fisch. & Trautv.

Geum aleppicum Jacq.

Geum aleppicum Jacq. var. strictum (Ait.) Fern. = G.
aleppicum

100

= =2= 2222225

= £23252 22 = 2222 £22222 2 = LEE 2

Geum glaciale J.E. Adams ex Fisch.

Geum rossii (R. Br.) Ser.

Geum triflorum Pursh

Glaux maritima L. ssp. obtusifolia (Fern.) Boivin
Glyceria borealis (Nash) Batchelder

Glyceria grandis S. Wats.

Glyceria striata (Lam.) A.S. Hitchc. var. stricta
(Scribn.) Fern.

Gymnocarpium disjunctum (Rupr.) Ching
Gymnocarpium robertianum (Hoffmann) Newman
Habenaria dilatata (Pursh) Hook. = Platanthera
dilatata var. dilatata

Habenaria viridis (L.) R. Br. var. bracteata (Muhl.
ex Willd.) Reichenb. ex Gray = Coeloglossum
viride var. virescens

Hackelia americana (Gray) Fern. = H. deflexa var.
americana

Hackelia deflexa (Wahlenb.) Opiz var. americana
(Gray) Fern. & I.M. Johnston ex Fern.
Halimolobos mollis (Hook.) Rollins

Harrimanella hypnoides (L.) Coville

Hedysarum alpinum L. ssp. americanum (Michx.)
Fedtsch

Hedysarum alpinum L. = H. alpinum ssp.
americanum

Helenium autumnale L. var. grandiflorum (Nutt.)
Torr. & Gray

Hieracium gracile Hook.

Hieracium triste Willd. ex Spreng.

Hierochloe pauciflora R. Br.

Hippuris tetraphylla L. f.

Isoetes echinospora Durieu

Isoetes muricata Durieu var. braunii (Durieu) C.F.
Reed I. echinospora

Juncus drummondii E. Mey.

Koenigia islandica L.

Lagotis minor (Willd.) Standl.

Lagotis stelleri (Cham. & Schlecht.) Raup = L.
minor

Lathyrus japonicus Willd. var. aleuticus (Greene)
Fern. = L. japonicus var. japonicus

Lathyrus japonicus Willd. var. japonicus
Lathyrus ochroleucus Hook.

Lemna minor L.

Lepidium bourgeauanum Thellung

Leptarrhena pyrolifolia (D. Don) R. Br. ex Ser.
Listera cordata (L.) R. Br.

Lobelia kalmii L.

Lomatogonium rotatum (L.) Fries ex Fern. ssp.
rotatum

Lomatogonium rotatum (L.) Fries ex Fern. ssp.

SS £L£4 £22222 £2 22222252 = LS = LL LÉ LE FT FE 2EZ8

tenuifolium (Griseb.) Porsild = L. rotatum

Lonicera dioica L. var. glaucescens (Rydb.) Butters
Luzula arctica Blytt ssp. latifolia (Kjellm.) Porsild
Luzula arcuata (Wahlenb.) Sw.

Luzula nivalis (Laest.) Beurl. var. latifolia (Kjellm.)
Samuelsson = L. arctica ssp. latifolia

Lycopodium alpinum L.

Lycopodium clavatum L. var. monostachyon Grev. &
Hook.

Lycopodium complanatum L. ssp. chamaecyparissus (A.
Br.) Asch. & Gr. var. boreale Victorin = L. X zeilleri
Lycopodium dendroideum Michx.

Lycopodium obscurum L. var. dendroideum (Michx.)
D.C. Eat. = L. dendroideum

Maianthemum canadense Desf.

Maianthemum canadense Desf. var. interius Fern. = M.
canadense

Matteuccia struthiopteris (L.) Todaro

Matteuccia struthiopteris (L.) Todaro var. pensylvanica
(Willd.) Morton = M. struthiopteris

Melandrium apetalum (L.) Fenzl ssp. attenuatum (Farr)
Hara = Silene uralensis ssp. attenuata

Melandrium taimyrense Tolm. = Silene taimyrensis
Melandrium taylorae (B.L. Robins.) Tolm. = Silene
taylorae ;
Melandrium triflorum (R. Br. ex Sommerf.) J. Vahl =
Silene sorensenis

Mertensia maritima (L.) S.F. Gray

Minuartia obtusiloba (Rydb.) Hause

Moehringia macrophylla (Hook.) Fenzl

Montia fontana L. ssp. fontana

Montia lamprosperma Cham. = M. fontana ssp. fontana
Muhlenbergia glomerata (Willd.} Trin.

Muhlenbergia glomerata (Willd.) Trin. var. cinnoides
(Link) F.J. Herm. = M. glomerata

Muhlenbergia richardsonis (Trin.) Rydb.

Myosotis alpestris F.W. Schmidt ssp. asiatica Vesterg =
M. asiatica

Myosotis asiatica (Vesterg.) Schischkin & Sergievskaja
Oryzopsis asperifolia Michx.

Oxycoccus quadripetalus Gilib. = Vaccinium oxycoccos
Oxytropis arctobia Bunge = O. nigrescens var. uniflora
Oxytropis bellii (Britt. ex Macoun) Palibine

Oxytropis deflexa (Pallas) DC. var. foliolosa (Hook.)
Barneby

Oxytropis deflexa (Pallas) DC. var. sericea Torr. & Gray

Oxytropis foliolosa Hook. = O. deflexa var. foliolosa
Oxytropis hudsonica (Greene) Fern. = O. viscida var.
hudsonica

Oxytropis jordalii Porsild

Oxytropis nigrescens (Pallas) Fisch. ex DC. ssp. bryophila

= = Æ

SS == 2222222257 £ = = LLLELLLELLLLLELELE £7

(Greene) Hultén = O. nigrescens var. nigrescens
Oxytropis nigrescens (Pallas) Fisch. ex DC. ssp.
pygmaea (Pallas) Hultén = O. nigrescens var.
nigrescens

Oxytropis nigrescens (Pallas) Fisch. ex DC. var.
nigrescens

Oxytropis nigrescens (Pallas) Fisch. ex DC. var.
uniflora (Hook.) Barneby

Oxytropis sheldonensis Porsild = O. viscida var.
viscida

Oxytropis terrae-novae Fern.

Oxytropis viscida Nutt. var. hudsonica (Greene)
Barneby

Oxytropis viscida Nutt. var. viscida

Papaver cornwallisense D. Love. = P. radicatum
Papaver dahlianum Nordh. = P. radicatum
Papaver hultenii Knaben = P. lapponicum
Papaver keelei Porsild = P. macounii

Papaver macounii Greene

Papaver radicatum Rottb.

Parnassia fimbriata Koenig

Parrya arctica R. Br.

Parrya nudicaulis (L.) Boiss.

Pedicularis flammea L.

Pedicularis hirsuta L.

Pedicularis verticillata L.

Petasites arcticus Porsild = P. frigidus var.
palmatus

Petasites frigidus (L.) Fries var. nivalis (Greene)
Cronq.

Petasites frigidus (L.) Fries var. palmatus (Ait.)
Cronq.

Petasites hyperboreus Rydb. = P. frigidus var.
nivalis

Petasites vitifolius Greene = P. X vitifolius
Phacelia franklinnii (R. Br.) Gray

Phalaris arundinacea L.

Phippsia algida (Phipps) R. Br.

Phleum alpinum L.

Phleum commutatum Gaudin = P. alpinum
Phyllodoce caerulea (L.) Bab.

Phyllodoce empetriformis (Sm.) D. Don
Phyllodoce glanduliflora (Hook.) Coville

Pinus contorta Doug]. ex Loud. var. latifolia
Engelm. ex S. Wats.

Plantago eriopoda Torr.

Plantago juncoides Lam. var. glauca (Hornem.)
Fern. = P. maritima var. juncoides

Plantago maritima L. var. juncoides (Lam.) Gray
Platanthera dilatata (Pursh) Lindl. ex Beck var.
dilatata

101

FTSSSSSSSS SSS SS SSS SSES SS SSSE LELLLLLÉLSLELL EL LE

= ==

Poa abbreviata R. Br.

Poa alpigena (Fries ex Blytt) Lindm. f. var. colpodea
(Fries ex Blytt) Schol. = P. pratensis

Poa ammophila Porsild

Poa flexuosa Sm. = P. laxa var. flexuosa

Poa hartzii Gandog.

Poa lanata Scribn. & Merr.

Poa laxa Haenke var. flexuosa Sm.

Poa nascopieana Polunin

Poa pratensis L.

Polemonium boreale M.F. Adams

Polemonium pulcherrimum Hook.

Polygonum alaskanum W. Wight ex Hultén = P. alpinum
Polygonum alpinum All.

Polygonum caurianum B.L. Robins. ssp. caurianum
Potamogeton pectinatus L.

Potamogeton pusillus L.

Potamogeton strictifolius Benn.

Potamogeton strictifolius Benn. var. rutiloides Fern. = P.
strictifolius

Potamogeton zosteriformis Fern.

Potentilla anserina L. = Argentina anserina

Potentilla arguta Pursh

Potentilla biflora Willd. ex Schlecht.

Potentilla diversifolia Lehm. ssp. glaucophylla Lehm. =
P. diversifolia var. diversifolia

Potentilla diversifolia Lehm. var. diversifolia
Potentilla egedii Wormskj. = Argentina egedii ssp. egedii
Potentilla elegans Cham. & Schlecht.

Potentilla pulchella R. Br.

Potentilla rubricaulis Lehm.

Potentilla tridentata Ait. = Sibbaldiopsis tridentata
Potentilla uniflora Ledeb.

Potentilla vahliana Lehm.

Primula borealis Duby

Primula incana M.E. Jones

Prunus pensylvanica L. f.

Puccinellia agrostidea Sorensen

Puccinellia andersonii Swallen

Puccinellia angustata (R. Br.) Rand & Redf.
Puccinellia arctica (Hook.) Fern. & Weatherby
Puccinellia borealis Swallen = P. arctica

Puccinellia bruggemannii Serensen

Puccinellia contracta (Lange) Sorensen = P. angustata
Puccinellia deschampsioides Sarensen

Puccinellia interior Sorensen = P. distans (Jacq.) Parl.
ssp. hauptiana (Trin. ex Krecz.) W.E. Hughes
Puccinellia langeana Berlin = P. tenella ssp. langeana
Puccinellia tenella (Lange) Holmb. ssp. langeana (Berlin)
Tzvelev

Pyrola minor L.

102

Z£L£L£L£LLES

se

=

SS 2S 2255355525222 F LLTELE

= 2222 27

Ranunculus abortivus L.

Ranunculus eschscholtzii Schlecht.

Ranunculus gelidus Kar. & Kir. = R. karelinii
Ranunculus karelinii Czern.

Ranunculus pallasii Schlecht.

Ranunculus sabinii R. Br.

Ranunculus sulphureus Soland. ex Phipps
Rhodiola integrifolia Raf. = Sedum integrifolium
ssp. integrifolium

Rorippa hispida (Desv.) Britt.

Rorippa islandica (Oeder) Borbas ssp. fernaldiana
(Butt. & Abbe) Hultén = R. palustris var.
williamsii

Rorippa islandica (Oeder) Borbas ssp. hispida
(Desv.) Jonsel

Rosa woodsii Lindl.

Rubus alaskensis Bailey

Rubus arcticus L. ssp. acaulis (Michx.) Focke
Rubus paracaulis Bailey = R. X paracaulis
Rumex maritimus L.

Rumex maritimus L. var. fueginus (Phil.) Dusen =
R. maritimus

Rumex orbiculatus Gray = R. occidentalis var.
labradoricus

Sagina caespitosa (J. Vahl) Lange

Sagina intermedia Fenzl = S. nivalis

Sagina linnaei K. Pres] = S. saginoides

Sagina nivalis (Lindbl.) Fries

Sagina nodosa (L.) Fenzl ssp. borealis Crow
Sagina saginoides (L.) Karst.

Sagittaria cuneata Sheldon

Salix athabascensis Raup

Salix barclayi Anderss.

Salix barrattiana Hook.

Salix brachycarpa Nutt. var. fullertonensis
(Schneid.) Argus = S. niphoclada (Rydb.) Argus
Salix commutata Bebb

Salix cordifolia Pursh var. callicarpaea (Trautv.)
Fern. = S. glauca ssp. callicarpaea

Salix discolor Muhl.

Salix dodgeana Rydb. = S. rotundifolia ssp.
dodgeana

Salix farriae Ball

Salix fullertonensis Schneid. = S. niphoclada
(Rydb.) Argus

Salix glauca L. ssp. callicarpaea (Trautv.) Bocher
Salix gracilis Anderss. = S. petiolaris

Salix hastata L.

Salix lanata L. ssp. calcicola (Fern. & Wieg.)
Hultén

Salix maccalliana Rowlee

SSSSSSe £222 SS S2SSESE SSSZSSE =F LES FES FESSSSE FEES =

Salix mackenzieana (Hook.) Barratt ex Anderss. = S.
prolixa

Salix petiolaris Sm.

Salix phlebophylla Anderss.

Salix polaris Wahlenb.

Salix polaris Wahlenb. ssp. pseudopolaris (Flod.) Hultén
= S. polaris

Salix prolixa Anderss.

Salix pyrifolia Anderss.

Salix rotundifolia Trautv. ssp. dodgeana (Rydb.) Argus
Salix serissima (Bailey) Fern.

Salix uva-ursi Pursh

Saussurea angustifolia (Willd.) DC. var. yukonensis
Porsild = S. viscida

Saussurea viscida Hultén

Saxifraga adscendens L. ssp. oregonensis (Raf.) Bacig.
Saxifraga aizoon Jacq. var. neogaea Butters = S.
paniculata

Saxifraga bronchialis L. ssp. funstonii (Small) Hultén
Saxifraga calycina Sternb. ssp. calycina

Saxifraga cespitosa L. ssp. exaratoides (Simm.) Engl. &
Irmsch. emend. Porsild

Saxifraga davurica Willd. var. grandipetala (Engl. &
Irmsch.) Boivin = S. calycina ssp. calycina

Saxifraga flagellaris Willd. ex Sternb. ssp. flagellaris
Saxifraga lyallii Engl.

Saxifraga nelsoniana D. Don ssp. nelsoniana

Saxifraga paniculata P. Mill.

Saxifraga punctata L. ssp. nelsoniana (D. Don) Hultén =
S. nelsoniana ssp. nelsoniana

Saxifraga radiata Small = S. sibirica

Saxifraga reflexa Hook.

Saxifraga serphyllifolia Pursh

Saxifraga sibirica L.

Scheuchzeria palustris L. ssp. americana (Fern.) Hultén
Scheuchzeria palustris L. var. americana Fern. = S.
palustris ssp. americana

Schizachne purpurascens (Torr.) Swallen

Scirpus hudsonianus (Michx.) Fern. = Eriophorum
alpinum

Scirpus microcarpus J. & K. Presl

Scolochloa festucacea (Willd.) Link

Sedum integrifolium (Raf.) A. Nels. ssp. integrifolium
Sedum rosea (L.) Scop. ssp. integrifolium (Raf.) Hultén
= Sedum integrifolium ssp. integrifolium

Selaginella rupestris (L.) Spring = S. sibirica
Selaginella sibirica (Milde) Hieron. = S. rupestris
Senecio atropurpureus (Ledeb.) Fedtsch.

Senecio cymbalaria Pursh

Senecio fuscatus Hayek

Senecio hyperborealis Greenm.

= 2222 S225 22252 2222222 2e

= #22 = = = 4 = 222 LE =

Senecio kjellmanii Porsild = S. atropurpureus
Senecio lindstroemii (Ostenf.) Porsild = S. fuscatus
Senecio pauciflorus Pursh

Senecio triangularis Hook.

Senecio yukonensis Porsild

Sibbaldia procumbens L.

Sibbaldiopsis tridentata (Ait.) Rydb.

Silene menziesii Hook.

Silene repens Patrin ex Pers. ssp. purpurata
(Greene) C.L. Hitchc. & Maguire

Silene sorensenis (Boivin) Bocquet

Silene taimyrensis (Tolm.) Bocquet

Silene taylorae (B.L. Robins.) Hultén

Silene uralensis (Rupr.) Bocquet ssp. attenuata
(Farr) McNeill

Smelowskia borealis (Greene) Drury & Rollins
Sorbus scopulina Greene

Sphenopholis intermedia (Rydb.) Rydb.

Spiraea beauverdiana auct. non Schneid. = S.
stevenii

Spiraea stevenii (Schneid.) Rydb.

Stellaria crassipes Hultén

Stellaria longipes Goldie var. longipes

Stellaria stricta Richards. = S. longipes var.
longipes

Streptopus amplexifolius (L.) DC. var. americanus
J.A. & J.H. Schultes = S. amplexifolius var.
amplexifolius

Streptopus amplexifolius (L.) DC. var.
amplexifolius

Suaeda calceoliformis (Hook.) Mogq.

Subularia aquatica L. ssp. americana Mulligan &
Calder

Symphoricarpos occidentalis Hook.

Taraxacum alaskanum Rydb. = T. phymatocarpum
Taraxacum arcticum (Trautv.) Dahlst. = T.

phymatocarpum

Taraxacum arctogenum Dahlst. = T. officinale ssp.
ceratophorum

Taraxacum dumetorum Greene = T. officinale ssp.
ceratophorum

Taraxacum hyperboreum Dahlst. = T. officinale
ssp. ceratophorum

Taraxacum integratum Hagl. = T. officinale ssp.
ceratophorum

Taraxacum lapponicum Kihlm. ex Hand.-Maz. =
T. officinale ssp. ceratophorum

Taraxacum lyratum (Ledeb.) DC.

Taraxacum mackenziense Porsild = T.
phymatocarpum

Taraxacum maurolepium Hagl. = T. officinale ssp.

103

£ = £22222 LE LES LE = =

See = 222 LES = = 22%

ceratophorum

Taraxacum officinale G.H. Weber ex Wiggers ssp.
ceratophorum (Ledeb.) Schinz ex Thellung

Taraxacum pellianum Porsild = T. officinale ssp.
ceratophorum

Taraxacum phymatocarpum J. Vahl

Taraxacum pseudonorvegicum Dahlst. = T. officinale ssp.
ceratophorum

Taraxacum pumilum Dahlst. = T. phymatocarpum
Taraxacum sibiricum Dahlst. = T. lyratum

Trientalis europaea L. ssp. arctica (Fisch. ex Hook.)
Hultén

Trisetum spicatum (L.) Richter

Trisetum spicatum (L.) Richter ssp. molle (Kunth) Hultén
= T. spicatum

Typha latifolia L.

Urtica dioica L. ssp. gracilis (Ait.) Seland.

Urtica gracilis Ait. = U. dioica ssp. gracilis

Utricularia minor L.

Utricularia ochroleuca R.W. Hartman

Vaccinium myrtilloides Michx.

Vaccinium oxycoccos L.

Vahlodea atropurpurea (Wahlenb.) Fries ex Hartman ssp.
atropurpurea

Vahlodea atropurpurea (Wahlenb.) Fries ex Hartman ssp.
latifolia (Hook.) Porsild

Vahlodea atropurpurea (Wahlenb.) Fries ex Hartman ssp.
paramushirensis (Kudo) Hultén = V. atropurpurea ssp.
latifolia

Valeriana capitata Pallas ex Link

Valeriana sitchensis Bong.

Veratrum eschscholtzii Gray = V. viride ssp.
eschscholtzii

Veratrum viride Ait. ssp. eschscholtzii (Gray) A. & D.
Love

Veronica alpina L. var. unalaschcensis Cham. & Schlecht.
= V. wormskjoldii

Veronica americana Schwein. ex Benth.

Veronica peregrina L. ssp. xalapensis (Kunth) Pennell
Veronica peregrina L. var. xalapensis (Kunth) Pennell =
V. peregrina ssp. xalapensis

Veronica scutellata L.

Veronica wormskjoldii Roemer & J.A. Schultes
Veronica wormskjoldii Roemer & J.A. Schultes ssp.
alterniflora (Fern.) Pennell = V. wormskjoldii

Viola adunca Sm. var. minor (Hook.) Fern. = V.
labradorica

Viola epipsila Ledeb. ssp. repens Becker

Viola labradorica Schrank

Viola macloskeyi Lloyd ssp. pallens (Banks ex DC.) M.S.
Baker

104

=== ==

Viola nephrophylla Greene

Viola pallens (Banks ex DC.) Brainerd = V.
macloskeyi ssp. pallens

Viola palustris L.

Wilhelmsia physodes (Fisch. ex Ser.) McNeill
Woodsia alpina (Bolton) S.F. Gray

Recent Syllogeus Titles / Titres récents dans la collection Syllogeus

No. 54
No. bi
- No. 56
_ No. 57

No. 58

No. 59 .

No. 60

‘No. 63

No. 64

No. 65

No..66
No. 67
No. 68

No. 69

No. 70

No. 71

No. 72

McAllister, Don E., Brad J. Parker and Paul M. McKee (1985)
RARE, ENDANGERED AND EXTINCT FISHES IN CANADA. 192 p.

Harington, C.R., editor (1985)
CLIMATIC CHANGE IN CANADA 5. 482 p.

Brodo, I.M. (1985)
GUIDE TO THE LITERATURE FOR THE IDENTIFICATION OF NORTH AMERICAN LICHENS. 39 p.

Vladykov, Vadim D. (1985) ;
DOES NEOTENY OCCUR IN HOLARCTIC LAMPREYS (PETROMYZONTIDAE)? 13 p.

Schriever, G., H.K. Schminke and C.-t. Shih, editors (1985)
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE OF COPEPODA, OTTAWA, CANADA, 13-

17 AUGUST 1984. 662 p.

Straley, G.B., R.L. Taylor and G.W. Douglas (1985)
THE RARE VASCULAR PLANTS OF BRITISH COLUMBIA. 165 p.

Frank, P.G., J.A. Fournier and J. Madill (1985)
TYPE SPECIMENS OF INVERTEBRATES (MOLLUSCA AND ARTHROPODA EXCLUDED) IN THE NATIONAL
MUSEUM OF NATURAL SCIENCES, NATIONAL MUSEUMS OF CANADA. 147 p.

Noble, W.J., T. Ahti, G.F. Otto and ILM. Brodo (1987)

A SECOND CHECKLIST AND BIBLIOGRAPHY OF THE LICHENS AND ALLIED FUNGI OF BRITISH COLUMBIA. :

95 p.

Ireland, R.R. and G. Bellolio-Trucco (1988)

ILLUSTRATED SORE TO SOME HORNWORTS, LIVEWORTS AND MOSSES OF EASTERN CANADA.

205 p.

Sine James H., Claude E. Garton, and David R. Given (1989)
FLORA OF THE NORTH SHORE OF LAKE SUPERIOR (VASCULAR PLANTS OF THE ONTARIO PORTION OF
THE LAKE SUPERIOR DRAINAGE BASIN). 61 p.

McAllister, Don E. (1990)
A LIST OF THE FISHES OF CANADA / LISTE DES POISSONS DU CANADA 310 p.

Bouchard, André, Stuart Hp Luc Brouillet, Martin Jean and Isabelle Saucier (1991)
THE RARE VASCULAR PLANTS OF THE ISLAND OF NEWFOUNDLAND / LES PLANTES VASCULAIRES RARES

: DE l'LLE DE TERRE-NEUVE. 165 P.

Youngman, Phillip M. (1991)
A BIBLIOGRAPHY OF MUSTELIDS: PART IX: EUROPEAN MINK. 45 p.

Day, Robin, and Paul M. Catling (1991)
THE RARE VASCULAR PLANTS OF PRINCE EDWARD ISLAND. 65 p.

Coad, Brian w. (1991)
FISHES OF THE TIGRIS-EUPHRATES BASIN: A CRITICAL CHECKLIST. 49 p.

Wong, Pak Yau and Irwin M. Brodo (1992)
THE LICHENS OF SOUTHERN ONTARIO, CANADA. 79 p.

Ireland, Robert R. and Linda M. Ley (1992)
ATLAS OF ONTARIO MOSSES. 138 p.

Balkwill, Darlene McCuaig and Stephen L. Cumbaa (1992)
A GUIDE TO THE IDENTIFICATION OF POSTCRANIAL BONES OF BOS TAURUS AND BISON BISON.
277 p.

McJannet, Cheryl, George Argus, Sylvia Edlund and Jacques Cayouette (1993)
RARE VASCULAR PLANTS IN THE CANADIAN ARCTIC. 79 p.

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