A condensed botany;

A CONDENSED

BOTANY;

DESIGNED AS A

TEXT^BOOK FOR COMMON SCHOOLS, AND AN ELEMENTARY
WORK. IN HIGH SCHOOLS AND ACADEMIES,

BY

JOSEPH A. SEWALL, M. D.,

Professor of Natural Sciences in Illinois State Normal University.

CHICAGO:
GEO. SHERWOOD & CO.

Entered according to Act of Congress, in the year 1872,

By GEORGE SHERWOOD & CO.,

In the Office of the Librarian of Congress, at Washington, D. C.

PREFACE.

This book, though Elementary, is not designed for Primary
Schools particularly, neither is it expected that it will take the
place of such works as are intended for the classes of Seminaries
and Colleges.

It has been prepared with special reference to the wants and
demands of the, boys and girls of our Common Schools.

It is not reasonable to suppose that any considerable number
of the pupils, whether in the country or in the town, will become
skilled botanists; yet it is possible for the gfeat majority of
them to obtain some knowledge of the Plan of Vegetation.

I have aimed to use but few words, feeling assured, that if
concise and exact statements and definitions are carefully studied,
the subjects treated of may be fully understood.

A comparatively full Glossary, or Dictionary of Terms, is
added, for the convenience of the pupil.

The Illustrations, all of which are from nature, are from the
pencil of Mrs. F. Pierce Smith, of Bloomington ; and the
Engravings by A. Maas, Chicago.

The Table of Contents will assist both teacher and learner
in fixing upon the more important points of each lesson, and
will be particularly useful in reviews.

J. A. SEWALL.
Normal, July 8, 1872.

TABLE OF CONTENTS.

LESSON I.

Botany Defined. Different forms of Vegetation. Parts of

a Plant. Root. Stem. Leaves. - - - - 13

LESSON IL

Kinds of Leaves. Parallel-veined, Net-veined ; Radiate

and Feather- veined Leaves. - - - .. 17

LESSON III.

Forms of Leaves as to General Outline ; as to the Margin ;
as to the Base; as to the Apex. Compound Leaves,
Perfoliate Leaves. Equitant Leaves. - - - - 20

LESSON IV.

Arrangement of Leaves. Opposite, Alternate. The

Mathematics of Leaf-Arrangement. - - - - 42

LESSON V.

The Stem. Buds. Root-stock. Tubers. Corms. Run-
ners. Suckers. Stolons. Thorns. Bulbs. Bulblets. 45

LESSON VL

Roots. Simple Primary ; Multiple Primary. Secondary.

Epiphytes; Parasites. -.- - - - -56

Vi CONTENTS.

LESSON VII.

The Flower. Terminal; Axillary. Indefinite Flowering;
Definite Flowering. Peduncle and Pedicel. Raceme.
Corymb. Umbel. Spike. Head. Catkin. Panicle.
Cyme. Fascicle. Glomerule. - - - - - 59

LESSON VIII.

The Parts of the Flower. Essential Organs. Floral
Envelopes. Calyx. Sepals. Corolla. Petals. Stamens.
Pistils. Receptacle. - -' - - - - - 69

LESSON IX.

The Plan of the Flower. Perfect. • Complete. Regular.
Symmetrical. Monoecious. Dioecious. Abortive Organs.
Multiplication of Parts. - -- - - -7^

LESSON X.

The For^s of the Flower. The Flower an ' Altered

Branch. - - - - - • - - - 75

LESSON XI.
The Pistil. Simple. Compound. Open. - - - 78

LESSON XII.

The Fruit. Fleshy Fruits. Stone Fruits. Dry Fruits.

Legume. Follicle. Strobile. - - - - -Si

LESSON* XIII.
The Seed. - - - -By

CONTENTS. yii

LESSON XIV.

How Plants Grow. Growth, Cells. Cellular Tissue.

Wood. Endogens. Exogens. - - - - - 88

LESSON XV.

The Chemical Composition of Plants. Organic- Inor-
ganic. Earth and Air the Food of Plants. - - -

Cryptogamous Plants. - - - -- -92

Suggestions, Model Lessons, AND Examples, - - 93

GLOSSARY;

Dictionary of Terms Used in Describing Plants.

Abortive : imperfectly formed or rudimentary.

Acheniutn : (plural Achenia^) a one-seeded, seed-like fruit.

Aciiminate : taper-pointed.

Acute : merely sharp-pointed, or ending in a point less than a

right angle.
Adventitious : ovX of the proper or usual place.
Alt&nate (leaves) : one after another.
Annual (plant) : flowering and fruiting the year it is raised from

the seed, and then dying.
Anther : the essential part of the stamen, which contains the pollen.
Axil : the angle on the upper side between a leaf and the stem.
Axillary (buds, etc.) : occurring in an axil.

Berry : a fruit, pulpy or juicy throughout, as a grape.

Bidnnial : of two years* continuance ; springing from the seed one

season, flowering and dying the next.
Blade of a leaf : its expanded portion.
Bract : bracts are the leaves of an inflorescence, differing more or

less from ordinary leaves.
\yBractlet : a bract seated on the pedicel or flower-stalk.
Bud : a branch in its earliest or undeveloped state.
Bulb : a leaf bud with fleshy scales, usually subterranean.

10 SEW all's botany.

Calyx : the outer set of the floral envelopes or leaves of the flower.

Vatkin : a scaly, deciduous spike of flowers ; an ament.

Cone : the fruit of the Pine family.

Cordate : heart-shaped.

Corm : a solid bulb, like that of the Crocus.

Cordlla : the leaves of the flower within the calyx.

Cdrymb : a flat or convex flower-cluster.

Culm : a straw ; the stem of grasses and sedges.

Cycle : one complete turn of a spiral or circle.

Cyme : a cluster of centrifugal inflorescence.

Dentate : toothed (from the Latin defis^ a tooth.)

Dicecious : having the stamens and pistils in separate flowers.

on different plants.
Divided : cut into divisions extending about to the base or midrib.
Dorsal : pertaining to the back.

Elliptical : oval or oblong, with the ends regularly rounded.
Entire : the margins not at all toothed, notched or divided, but

even.
Epiphyte : a plant growing on another plant, but not nourished

by it.

Filament : the stalk of a stamen.

Fleshy : composed of firm pulp or flesh.

Floral-envelopes : the leaves of a flower.

Flower : the organs of reproduction (of flowering plants,) with

their envelopes.
Flower-bud : an unopened flower.
Fruit : the matured ovary and all it contains or is connected with.

""Gldmerule : a dense head-like cluster.

Herbaceous: of the texture of common herbage; not woody.

GLOSSARY. 11

Imperfect (flower) : wanting either stamens or pistils.
Incomplete (flower) : wanting calyx or corolla.
Ifiiernode : the part of a stem between two nodes;

Leaflet : one of the divisions or blades of a compound leaf.
Linear : narrow and flat, with the margins parallel.

Midrib : the middle or main rib of a leaf.

Net-veined : furnished with branching veins forming net-work.
Node : a knot; the "joints " of a stem, or the part whence a leaf
or a pair of leaves spriijgs.

Obcdrdate : heart-shaped, with the broad and notched end at the

apex instead of the base.
Obldnceolate : lance-shaped, with the tapering point downwards.

Palmate : having the leaflets or the divisions of a leaf all spread
from the apex of the petiole, like the hand with the out-
spread fingers.

FMicel : the stalk of each particular flower 6f a cluster.

Fediincle : a flower-stalk, whether of a single flower or of a flower-
cluster.

Peltate : shield-shaped ; said of a leaf, whatever its shape, when

the petiole is attached to the lower side, within the margin.
Perennial : lasting from year to year.
Perfect {^owtx) : having both stamens and pistils.
Perf dilate (leaf) : surrounding the stem at the base.
Petal : a leaf of the corolla.
Petiole : a foot-stalk of a leaf; a leaf-stalk.
Pistil : the seed-bearing organ of the flower.
Pollen : the fertilizing powder of the anther.

12 sewall's botany,

Racime : a flower-cluster, with one-flowered pedicels arranged

along the sides of a general peduncle.
Recepta^de : tjje axis or support of a flower.
Regular : having all the parts similar.
Rib: the principal piece, or one of the principal pieces, of the

fr^me-work of a leaf.
Rootlets ': small roots or root-branches.
Root-stock : root-like trunks or portions of stems on or under

ground.
Runner : a slander and prostrate branch, rooting at the end or at

the joints,, as of a strawberry.

Sepal : a leaf or division of the calyx.

Separated Flowers : those having stamens or pistils only.

Sessile : sitting ; without any stalk, as a leaf destitute of petiole,^

or an anther destitute of filament.
Spike: an inflorescence like a raceme, only that the flowers are

sessile.
Stigma : the part of the pistil which receives the pollen.
Style : a part of the pistil which bears the stigma.
^Sz^r^^/'j ; shoots from subterranean branches.
Symmetrical (flower) : similar in the number of parts of each set.

Tendril : a thread-shaped body used for climbing ; it is either a
branch, as in Virginia Creeper, or a part of a leaf, as in the Pea.

Terminal : boirne at or belonging to the extremity or summit.

Tuber : a thickened portion of a subterranean stem or branch,
provided with eyes (buds) on the sides.

Umbel : the umbrella-like form of inflorescence.

Veinlets : the smaller ramifications of veins.

BOTANY.

LESSON I.

THE STUDY OF PLANTS.

1. When we examine Plants, to find out how they grow,
how they are classed, what parts they are made up of, and
what uses these parts serve, we are studying Botany.

2. If we look at the plants growing in the field or in the
forest, we see that they differ greatly in form, in size, in
the shape of the leaves, in the appearance of the flowers, and
in the character of the fruit. Yet Ave shall observe that all
plants are constructed on one simple plan.*

3. Each plant consists of Root, Stem and Leaves.

4. We find parts of the plant that take particular names,
such as bud, flower, fruit, thorn, &c., that do not, at first sight
at least, appear to be either root, stem or leaf ; but if we
carefully study the plan of the plant, we shall discover that
each of these is some form of root, stem or leaf, or some
combination of these parts.

6. The Root is that part of the plant which grows down-
ward^ commonly entering the soil, from which it takes nour-
ishment.

It branches indefinitely and without order^ hut hears no other
appendages. Its ultimate branches are called Rootlets.

Note. It would be well for the teacher to call attention to such planes as
differ greatly : i. In form, o.^ the cabbage and 2l blade of grass. 2. In size, as
the oak and the dandelion. ■ 3. In the fiower, as the common plantain and the
peony. 4. In the fruit, as the cherry and the squash.

ROOT, STEM AND LEAVES.

THE STUDY OF 1>LANTS.

15

6. The Stem is that part of the plant \t^hich commonly
grows upward into the light and air, bearing leaves.

It consists of a succession of leaf-bearing points, called
Nodes, separated by naked joints, called Internodes.

7. Leaves are expanded appendages of the stem.

They consist of loose cellular tissue, supported by a net-
work of woody fiber, called Ribs or Veins, and are covered
by a thin but quite firm skin, called Epidermis.

8. They are sometimes attached to the stem by a small
gtalk, called the Petiole or leaf-stalk. The petiole sometimes
bears, at its base, two small leaf-like bodies, called Stipules.

LEAF. PETIOLE. STIPULES.

9. Some leaves have no leaf -stalk, but are borne directly
on the stem* Most leaves are without stipules.

16

SEWALIi^S BOTA:c!nr,

lO, ' The larger parts of the net-work of woody fiber are
called ribs ; the smaller, veins ; and the smallest, veinlets.

LEAVES.

17

LESSON 11.

LEAVES.

11. We will examine the leaves first, as they are easily-
seen and handled, and a^ they present a. greater variety of
forms, and answer a greater variety of purposes, than do both
of the other parts combined.

PARALLEL-VEINED LEAF.

18

sewall's botany.

NET- VEINED LEAF,

LEAVES.

19

12. Take a leaf from a corn-stalk; tear it. You will
observe that it will split or tear quite easily in one direction —
from end to end. If yon look carefully at the leaf, you will
see that there are many small ridges or ribs running in the
same direction, parallel to each other. Such leaves are
called Parallel-veined,

FEATHER- VEINED LEAF.

13. Take the leaf of a maple or of a squash vine, and
tear it. You will observe that it, will not tear regularly ^

Note. — The pupil should make a collection of leaves, and separate the
parallel-veined from the net-veined leaves.

20 SEWALL'S BOTANY.

that is, not in any particular direction. Hold it up to the
light, and you will see that the ridges or ribs run in almost
every direction, and form a sort of net-work. Such leaves
are called Net-veined.

14. In net-veined leaves, you will frequently find that a
single strong rib, called the midrib, which seems to be a con-
tinuation of tlie leaf-stalk, runs directly through the middle
of the leaf to the very top, and that from this midrib the
lateral or side veins all diverge.

Such leaves are called Feather-veined.

15. In other net-veined leaves, the leaf-stalk seems to
divide, at the point where it joins the leaf, into three or
more portions or ribs, of nearly equal size ; and these give
off veins and veinlets.

Such leaves are called Radiate, or Palmate-veined.

LESSON III.

THE FOEMS OF LEAVES.

16. Leaves have an almost infinite variety of forms.
Such names are given them as their forms suggest.

17. Here is a group, each of which is named as to its
general form : Linear, Lanceolate, Oblong, Elliptical, Ovate,
Oblanceolate, Spatulate, Obovate. You will observe that
the four last named taper toward the base.

THE FORMS OP LEAVES

21

RADIATE-VEINED LEAF.

sewall's botany.

OVATE.

OBLANCEOLATE.

OfeLONG.

LANCEOLATE.

CUNEATE.

ELLIPTICAL,

THE FOBMB OF LEAVES.

23

SPATULATE.

OBOVATE.

LINEAR

18. Here is a group, each named from the shape of the base :
Auriculate, Hastate, Cordate, Reniform, Peltate.

CORDATE.

24

SEWALKS BOTANY.

ARTICULATE,

SAGITTATE,

THE rOKMS OF MiAVES.

25

HASTATE,

26

sewall's botany.

19. Here is a group, each named from the shape of the
^op or apea;: Acuminate, Acute, Obtuse, Truncate, Retuse,
Obcordate.

ACUMINATE.

OBTUSE.

TRUNCATE.

RETUSE.

THE FORMS OP LEAVES.

27

OBCORDATE.

20. Here is a group, each named with reference to the
shape of the margin: Entire, Serrate, Dentate, Repand,
Sinuate, Incised.

REPAND.

CRENATE.

28

SEW ALL S BOTANY.

1

7

SERRATE.

ENTIRE

THE FOllMS OF LEAVES.

29

DENTATE.

30

sewaWs HOTANY. '

THE BOBMS OP LEAVES.

31

INCISED,

32

sewall's botany.

21. When the incisions in a leaf extend about half way
to the middle, and are somewhat rounded, it is said to be
Lobed. When the incisions extend more than half way, it is
said to be Cleft.

LOBED.

When the incisions extend almost to the midrib or to the
base of the leaf, it is said to be Parted.

When the incisions extend quite to the midrib or to the
base of the leaf, it is said to be Divided.

THE FORMS OF LEAVES.

3B

PARTED.

34

sewall's botany.

22. There are two kinds of net-veined leaves, you will
remember; arid each kind may be loled^ cleft^ parted^ or
divided^ as you will see in the Figures.

FiCATHER-VElNED LOBED.

THE FORMS OF LEAVES.

35

FEATHfiR-VEINED CLEFT.

36

sewall's botany.

FEATHER-VEINED PARTED.

THE FORMS OF LEAVES.

87

FEATHER-VEINED DIVIDED.

38

SEWALL\S BOTANY.

FEATHER-VEINED COMPOUND LEAF.

THE FOBMS OF LEAVES.

39

23. A Compound Leaf is one which has its blade in two
or more entirely separate parts, called Leaflets. Compound
leaves are of two kinds, Feather-veined and Radiate-veined.

Feather-veined leaves may be Lobed, Cleft, Parted or
Divided.

Radiate-veined leaves may be Lobed, Cleft, Parted or
Divided.

RADIATE- VEINED COMPOUND LEAF.

24. In some plants the stem appears to run through the
blade of the leaf, near one end. Such leaves are called

Perfoliate.

40

SEWALL'S BOTANY.

PERFOLIATE LEAVES.

THE FORMS OF LEAVES.

41

EQUITANT LEAVES.

42

sewall's botany.

25. The stem does not really run through the leaf, but
the leaf clasps the stem, and the heart-shaped lobes of the
base grow together and enclose the st^m.

26. Such leaves as the Iris are called Equitant. They
are each folded lengthwise in the middle, and are packed
one over the other.

LESSON IV.

ARRANGEMENT OF LEAVES.

27. Leaves are arranged on the stem in some regular
order. Different kinds or species of plants have different
kinds of leaf-order, but the same kind or species always has
the same leaf-arrangement,

28. When a stem bears two leaves on the same node, one
is separated from the other by just one-half of the circum-
ference of the stem, and the leaves are said to be Opposite or
Two-ranked. The Indian Corn is a good illustration.

TWO-RANK£D»

AKKANGKMENT OF LEAVES. 43

29. When only one leaf is found arising from a node, the
leaves are said to be Alternate.

30. The simplest arrangement of alternate leaves is called
the Three-ranked ; that is, the leaves are separated by one-
third of the circumference of the stem, and three leaves
complete one cycle.

31. Beginning with any leaf on the stem, as (1) in the
figure, the next above it (2) is found to be one-third of the
circumference of the stem from (1) ; the next (3) is one-
third of 'the circumference from (2), and two-thirds of the
circumference from (1), the leaf at which we began to
count ; the next (4) is one-third of the circumference from
(3), and three-thirds, or the whole circumference, from the
leaf we began with.

32. We find that three leaves form a complete cycle, and
that the fourth leaf stands directly over, or in a vertical line
with, the first. The Alder and the Sedges are illustrations
of the three-ranked cycle.

33. The I arrangement is, perhaps, the most common.
The Cherry, the Apple, the Peach afford illustrations of it.
Here the leaves are two-fifths of a circumference from
each other.

34. The next is the f arrangement. Here the leaves are
three-eighths of a circumference from each other. The
Osage Orange is an illustration.

35. If we write in ordjer the series of fractions which
represent the simplest 'forms of leaf-arrangement that we
have observed, viz., |, i, |, |, we observe that the numerator

44

SEWALL'S BOTANY.

FIVE RANKED.

THREE RANKED,

THE STEM. 46

of the third fraction is the sum of the numerators of the first
and second, and the denominator of the third is the sum of
the denominators of the first and second. The numerator of
the fourth is the sum of the numerators of the second and
third, and its denominator the sum of their denominators.
By applying this simple rule we nmy extend this series;
thus, i, i I, I, y«-5, ^\, il, &c.

36. Each fraction in the above series tells us two things:.
First. How far distant, or what part of a circumference of
the stem, one leaf is from another.

37. Second. The numerator tells us how many times we
must pass around the stem to find a leaf directly over, or in
a vertical line with, the first one taken ; and the denominator
tells us the number of leaves in the circle or circles passed.
Thus, I, |, f, I, J^^ showing two cycles and five leaves;
h h h ¥> ¥> ¥» ¥) ¥» three cycles and eight leaves.

38. In the first of the above examples, we should pass
around the stem twice, and find five leaves in the two
cycles. In the second, we shpuld pass around the stem
three times, and find eight leaves in the three cycles.

LESSON V.

THE STEM.

39. The growing points of the stem are called Buds.
A bud is a collection of leaves on a short stem or axis.
By expanding its leaves and lengthening the axis, a bud
develops into a Branch,

46

sewall's botany.

40. When a bud grows upon the end of a stem, it is called
TerminaL

TERMINAL BUD.

AXILLARY BUDS,

AXILLARY BUD.

STEM, WITH BUDS.

THE STEM.

47

ROOT -STOCK.

48 sewall's botany.

When it grows in the axil of the leaf, that is, in the point
where the upper surface of the leaf joins the stem, it is called
Axillary.

41. When buds spring from any other part of the stem,
they are called Adventitious.

42. When a tree or shrub is wounded or bruised, there
will frequently appear a tuft or cluster of irregular shoots
or branches ; these come from adventitious buds.

43. The jointed stem of grasses ^nd similar plants is
called a Culm.

44. When the stem creeps along the ground or beneath
its surface, it is called a Root-stock.

It develops a bud at its end every year, which grows,
while the older portion of the root- stock decays.

The Mint and the Quick-grass arQ good examples.

45. When a ^tem or branch grows under ground and
becomes excessively thickened by a deposition of starc;hy
matter^ and is furnished with small scales having coiicealed
buds (eyes) in their axils, it is called a Tuber.

The common Potato is a good example of the tuber.

46. When an under-ground stem takes a solid, globular
form,' with buds at the top, apid roots below, and is filled with
starchy matter, it is called a Corm,

The Crocus is an example.

47. When an under-ground stem is short, and bears many
thickened leaves upon it, so that it seems to consist mainly
of these, it is called a Bulb.

THE STEM.

49

TUBER,

60

SEWALL S BOTAKY.

If you compare the bulb of the Canada Lily with the
strong buds of the Hickory, you will see that they are quite
alike in structure.

48. ~ Sometimes we find small bulbs above ground, in the
axils of the leaves. Such are called Bulblets. You will find
them on the Tiger Lily. They look like, and are sometimes
called, seeds, but are really little bulbs.

THE STEM.

51

BULB.

62

SEWALL S BOTANY.

SUCKER.

49. When a branch grows from an under-ground stem, it
is called a Sucker. The Raspberry is an example.

THE STEM*

58

50. When a branch trails, or runs along the surface of
the ground, and takes root, and sends up a shoot, we call it a
Stolon.

54

SEW all's botany.

51. A slender and leafless branch that takes root only at
the tip, is called a Runner.

52. When a branch is slender and leafless, and tends to
wind about something, to give support to the plant from
which it grows, it is called a Tendril.

THE STEM.

55

TENDRIT^

56 sewall's botany.

53. When a branch is stunted, 'hardened, leafless and
pointed, it is called a Thorn,

54. Sometimes a thorn is a leaf. We can easily deter-
mine, however, by its place, whether the thorn i^ a branch
or a leaf. If it is in the axil of the leaf it is a branch; if
not, it is a leaf.

Branches of neglected apple or. pear trees sometimes change
into thorns.

The thorns of the Honey-Locust are developed from adven-
titious buds.

LESSON VL

HOOTS.

65. When a single root descends directly from the seed,
it is calle.d Simple Primary. The Beet is an illustration.

Roots that descend in a cluster from the seed are called
Multiple Primary. The Onion is an illustration.

56. When roots grow from any part of the stem, they are
called Secondary. The roots seen above ground on the corn-
stalk are an illustration.

57. When a plant is borne on the trunk or branchy of a
tree, but derives its nourishment from^ the air, it is called an
Epiphyte or Air Plant.

68. A plant which draws its nourishment from the juices
of another, into whose trunk or branch it sends its roots, is
called a Parasite. The Dodder is an illustration.

BOOTS.

57

SIMPLE PRIMARY ROOT.

58

sewall's botany.

MULTIPLE PRIMARY ROOT.

THE FLOWER. 69

LESSON VII.

THE FLOWER.

59. The Flower is a modified branch, consisting of stem
and leaves, and is concerned in the productio^ of seed. The
flow'er stem is very short, and the leaves differ from the
ordinary or foliage leaves in form and color.

60. Flowers are developed from terminal or from axillary
buds. The same plant commonly produces both kinds of
foliage buds, but it rarely bears flower buds in both situa-
tions ; these are usually all terminal, or all axillary.

61. When all the flowers rise from axillary buds, the
flowering is said to be Indefinite ; because, while the axillary
buds produce flowers, the terminal (foliage) bud grows on,
and continues the stem indefinitely.

62. The stem of a flower is called the Peduncle. Wheii
a cluster of flowers is borne on a stem, the stem is called the
Common Peduncle, and the stalk or s^em of each particular
flower is called the Pedicel.

63. If the flower has no stem it is said to be Sessile.

64. The leaves on the common peduncle are called
Bracts, and those on the pedicels are called Bractlets.

65. A cluster of flowers borne on a common peduncle,
and each flower having a pedicel, is called a Raceme.

60

sewall's botaky

RACEME.

THE PLOWER.

61

CORYMB.

66. When the pedicels are unequal in length, the lower
ones being longer than the upper, the cluster is called a
Corymb,

62

SEWALL S BOTANY.

UMBEL.

THE FLOWED,

63

COMPOUND UMBEL.

67. When all the pedicels seem to spring from the top of
the common peduncle, and are equal in length, the cluster is
called an Umbel.

64

SEWALI»'S BOTANY.

68. When flowers are sessile on a common peduncle, as
in the Mullein and Plantain, the cluster is called a Spike.

THE FLOWER.

65

HEAD.

69. When flowers are sessile on a short and rounded
peduncle, as in the Clover, the cluster is called a Head.

66

sewaijl's botany.

PANICLE.

67

CYME,

68 sewall's botany.

70. Flower clusters like those of the Oak, the Willow,
the Poplar, are called Catkins,

71. The name Panicle is given to a raceme having
branches which bear flowers.

72. When flowers are developed from terminal buds, the
flowering is said to be Definite, In the simplest form of
definite flowering, the terminal bud develops into a flower
and terminates the growth of the stem.

73. When a flower rises from the terminal bud of the
main stem, and others from the terminal buds of the branches
of this stem, the cluster is called a Cyme. It will be observed
that the order of flowering in the cyme is the reverse of that
of the raceme. The former has flowers at the top, and buds
below; while the latter has buds at the top, and flowers below.

74. When the flowers are much crowded, as if into
a bundle, the cluster is called a Fascicle.

75. When the flowers are crowded into a compact head,
the cluster is called a Glomerule. The glomerule may be
known from the head, by the fact that in the head the
buds are found at the top, and the flowers below ; while in
the glomerule the flowers are found at the top, and the buds
below.

THE PARTS OF THE ELOWEB. 69

LESSON VIII.

THE PARTS OF THE FLOWER.

76. The parts of tlie flower tliat are necessary to the
production of seeds are called the Essential Organs. The
other parts are called the Floral Envelope.

77. The floral envelopes in a complete flower are double ;
that is, they consist of two circles of leaves, one above or
within the other.

78. The outer usually consists of green or greenish leaves,
and is called the Calyx.

79. The inner set, which is usually of a more delicate
texture, and some other color than green, forms, in most
cases, the most showy part of the flower, and is called the
Corolla.

80. Each leaf or separate piece of the corolla is called a
Petal ; each leaf of the calyx, a Sepal.

81. The essential organs are of two kinds, placed one
above or within the other. The lower or outer ones, which
bear a peculiar yellow dust called Pollen^ are the fertilizing
organs, and are called Stamens. The upper or inner ones,
which are to be fertilized and to bear the seeds, are called
Pistils.

82. Considering the flower as a branch, the lowest leaves
are called sepals; the next are called petals; the next,

70

SEW ALL S BOTANY.

stamens ; the highest, pistils. All these are borne on a
short stem, called the Receptacle.

Note. It would be well for the teacher to explain to the pupils that, though
the sepals, petals, stamens and pistils, especially the two latter, do not appear
like leaves, still they are forms of leaves.

Take a leaf from a book and roll it into the form of a hollow cylinder : it is
still a leaf. Roll it into a solid cylinder and flatten one end : it is still a leaf.
Color it yellow, red or blue ; and it is still a leaf.

So in the flower : the leaves assume peculiar shapes and colors, yet they are
truly leaves.

83. The Stamen has two parts. The upper and expand-
ed part that bears the pollen is called the Anther. The stalk
that bears the anther is called the Filament.

SIMPLE PISTIL,

THE PLAK OF THE FLOWER. 71

84. The Pistil consists of three parts. The lower part is
a hollow case containing immature seeds (ovules), and is
called the Ovary. The tapering part above the ovary is
called the Style. The top of the style is naked (that is, has
no covering of epidermis), and is called the Stigma.

It is upon the stigma that the pollen falls ; and the result
is, that the ovules contained in the ovary are fertilized and
become seeds.

85. Sometimes the filament is wanting: then the anther
is sessile. Sometimes the style is absent: then the stigma is
sessile. So the filament and style are not essential parts.

LESSON IX.

THE PLAN OF THE FLOWER.

86. The Flower, like every other part of the plant, is
formed upon a plan, which is essentially the same in. all
blossoms.

If -.we understand this plan^ the almost endless varieties,
which different flowers present will be understood.

87. When a flo\ver has both kinds of essential organs,
stamens and pistils, it is called Perfect.

88. When a flower has all the parts, calyx, corolla,
stamens and pistils, it is called Complete.

89. If all the parts of each set in a flower are alike in
size and shape, it is called Regular.

72 sewall's botany.

90. When the stamens and pistils are in separate blos-
soms, that is, one sort of flowers has stamens but no pistils,
and another has pistils but no stamens, the flower is called
Impetfect

PERFECT FLOWER.

91. The blossom which bears stamens is called a Stam-
inate or Sterile flower, and the one that has pistils is called a
Pistilate or Fertile flower.

92. When both kinds of flowers grow on the same plant,
it is said to be Monoecious.

93. When only staminate blossoms are found on one
plant, and only pistilate blossoms on another, the flowers are
said to be Dioecious,

94. If the calyx or corolla is missing, the flower is said to
be Incomplete. If both calyx and corolla, are missing, the
flower is said to be Naked.

95. When all the parts of the same set in a flower are of
different forms, it is called Irregular.

THE PLAN OF THE FLOWER.

T3

IRREGULAR FLOWERS.

96. When in a flower, different sets of organs (particu-
larly sepals and petals) do not agree in the number of their
parts, we call the flower Unsymmetrical.

97. The Spring Beauty is an unsymmetrical flower,
having two sepals and five petals. The Mustard, like all
the flowers of that family, is both unsymmetrical and irreg-
ular; the flower has six stamens and four petals, making

74

SEW all's botany.

it unsymmetrical, and as four of the stamens are long and
two short, it is irregular.

98, Sometimes the plan of the flower is more or less
obscured, either by Abortive Organs or by mere vestiges of
parts. In the flower of the Catalpa, the plan is five stamens ;
but we almost always find only two perfect ones ; the others
are vestiges, which seem to stand there merely to tell us
what the plan is.

99. Sometimes the plan of the flower is obscured more or
less by an increase in the number of parts. The Buttercup,
for instance, has five sepals and five petals, but many sta-
mens and pistils. Botanists, however, regard the Buttercup
as built upon the plan of five.

IRREGULAR FLOWER IN PARTS.

THK FORMS OJT THE FLOWEK. 75

LESSON X.

THE FORMS OF THE FLOWER,

100. It will be remembered that when we were studying
the stem, we found many forms of it. The trunk and
branches of a tree, the stalk of an herb, the trailing vine,
the straw of Wheat or grass, the slender runners of the
Strawberry, the tendrils of the Grape, the tubers of the
Potato, we learned, were forms of stem.

101. So we have observed that certain buds which might
have grown and lengthened into leafy branches, do, under
other circumstances, and to accomplish other purposes,
develop into blossoms.

102. In these the axis or stem remains short, nearly as
it is in the bud ; the leaves, therefore, remain close together
in sets or circles, the outer or lower ones, which constitute
the calyx, generally appearing more or less like the ordinary
foliage leaves.

103. The leaves of the next set above are more delicate,
and are usually more highly colored, while the next sets, the
stamens and pistils, appear in forms very different from those
of ordinary leaves, and are concerned in the production of
seed.

104. Again, flowers and branches arise from the same
places, or have the same position. Flower-buds, like leaf-
buds, appear either on the top of the stem, that is, as a ter-
minal bud, or in the axil of a leaf, as an axillary bud. Fur-

76 SEWALLS BOTANY^

thermore, it is quite impossible at an early stage to tell
whether the bud is to give rise to a blossom or to a branch.

105. The sepals and petals are called by persons who are
not botanists, the leaves of the flower.

106. The calyx is generally green, leaf-like; and though
the eoroUa is rarely green, yet, neither are the foliage leaves
always green. In some plants, such as the wild Painted
Cup, the leaves are of the highest scarlet, while the corolla
is^ a pale yellow.

107. Ill some plants there is such a, regular gradation
from the foliage leaves to those of the calyx, that it is quite
impossible to say where the one ends and the other begins.

108. Sepals, then, are leaves. So also are petals ; for
there is, in many instances, no clearly fixed limit between
them.

109. The calyx or the corolla often takes the form of a
cup or a tube, instead of being in separate pieces. The
same thing takes place with ordinary foliage leaves of many
jjlants ; for instance, those of the Honeysuckles.

110. When flowers are cultivated, they sometimes become
Double; that is, they change their stamens into petals. Even
some wild and natural flowers do the same thing.

111. The white Water Lily exhibits complete grada-
tions, not only between sepals and petals, but between petals
and stamens.

The sepals of this flower are green outside, and white a-nd
petal-like on the inside. The petals, which are in many rows,

THE F0BM8 OF THE FLOWER.

T7

WATER-LILY,

generally grow narrower towards the center of the flower.
Some of these are found to be tipped with a trace of a yel-'
low anther. The next are still more stamen-like, being nar-
rower and with a flat filament; and this narrowing continues
until we have a simple stamen.

112. Pistils often turn into petals, in cultivated flowers,
and, in the Double Cherry, they sometimes change into
small green leaves. Sometimes a whole blossom changes
into a cluster of green leaves, and sometimes it becomes a
leafy branch.

113. Ftom all these facts, we must conclude that the
flower is a branch consisting of stem and leaves.

78

SEWALL'S BOTAKY.

LESSON XT.

THE PISTIL.

114. The pistil is, in a certain sense, the most important
jpart of the flower; for, while all the other parts fall oif or
wither away, the pistil remains, and its ovary contains the
seeds that are to produce plants another time.

SIMPLE PISTIL-

COMPOUND PISTIL.

THE Pisrati. 79

115. As we have before shown, a Simple Pistil answers to
a leaf. When two or more leaves are combined to form a
pistil, it is called Compound,

116. The cone of the Pine or of the Spruce is a collection
of thick, scaly, open pistils^ Each scale or leaf is a pistil;
and the seeds— usually two — are borne at the base on the
upper side of the cell or leaf. This is perhaps the simplest
of all the pistils ; that is, it is in some particulars most like
an ordinary leaf.

CONE AND SEEDS,

117. Usually, however, the simple pistil consists of the
blade of a leaf curved until the. edges meet and unite, form-
ing a closed case, which is the ovary..

118. That the closed pistil is a leaf rolled up, is shown
by the fact that the pistil of the Double-flowering Cherry is
sometimes found changed back again into a small green leaf,
partly folded, as seen in the Figure,

80

SEWALL S BOTANY.

119. The line or seam down the inner side, which answers
to the united edges of the leaf, and bears the seeds or ovules,
is called the Inner or Ventral Suture.

120. The line or seam down the back of the ovary, and
which answers to the midrib of the leaf, is called the Outer
or Dorsal Suture. These sutures may be seen in the common
Pea pod.

121. The seeds are always borne on the ventral suture,
that is, on the edges of the leaf or leaves that make up
the pistil.

COMPOUND PISTIU

THE FKUIT.

81

122. A simple pistil can have but one cavity or cell ,
while a compound pistil (one made up of more than one
leaf) may have but one cell, or it may have as many as there
are leaves. Three leaves may unite to form one cell, or they
may so unite as to form three cells, as seen in the Figures

LESSON XII.

THE FEUIT.

123. The ripened ovary with its contents, is the Fruit.
When it adheres to the ovary, the calyx also becomes a part
of the fruit. In the apple and pear the calyx forms the
entire part of the fruit that we eat ; the Core is the ripened
ovary containing the seeds.

82

sewall's botany.

124. Some fruits, commonly so called, are not fruits at
all, according to the definition just given. A strawberry,
for example, is only an enlarged and pulpy stem (receptacle),
bearing on its surface the real fruits, the ripened ovaries,
commonly called seeds.

STRAWBERRY.

125. When, as the ovary ripens, its wall thickens and
becomes soft, we have what is called a Fleshy Fruit. The
Gooseberry, Blueberry, Cranberry and Currant, the Tomato
and the Grape, are examples of fleshy fruits. The Pumpkin,
Squash, Cucumber and Melon are examples of another sort
of fleshy fruits. The Apple, Pear and Quince are also
examples of fleshy fruits ; but here the fleshy part is made
up of the thickened walls of the calyx tube, and not of the
softened wall of the ovary.

126. When a fruit is partly hard and partly soft or fleshy,
it is called a Stone-Fruit. The Cherry, the Plum and Peach
are familiar examples.

127. We have seen that the pistil is formed from a leaf.
Now, the stone of a stone-fruit is formed from the upper part

THE FRUIT.

83

of this leaf (the inner part, when rolled), while the lower
part of the leaf forms the outer, soft or fleshy portion.

128. It is a curious fact that leaves are much denser on
the upper than on the under side.

129. When the walls of the ovary remain herbaceous in
texture, or become thin, we have the Dry Fruit The real
or botanical fruit of the Strawberry, and the fruit of the
Buttercup, are examples of dry fruits.

RASPBERRY.

130. In the Raspberry and Blackberry, each grain or
globular portion is a pistil that has ripened into a miniature
stone-fruit, so that in the Strawberry we eat the stem or

84

sewall's botany.

receptacle ; in the Raspberry we eat a cluster of stone-
fruits, like cherries on a very small scale ; and in the Black-
berry we eat both a cluster of stone-fruits and the stem or
receptacle on which they grow.

BLACKBERRY,

131. When the wall of the ovary is thin and adheres to
the seed, so that the wall and the seed seem to be incorpo-
rated into one body, the fruit is called a Caryopsis or Grain.
Wheat and Indian Corn arq familiar examples.

THE FItUIT.

85

LEGUME.

86 sewall's botany.

132. When the seed is enclosed in a hard or bony wall,
the fruit is called a Nut- The Acorn is, botanically speaking,
a nut.

ACORN.

133. The fruit of the Maple, the Elm, the Ash, is called
Samara or Key-Fruit.

134. A simple- pod with its contents, such as constitutes
the fruit of the Pea or Bean, is called a Legume, In the
pod we readily &ee the structure of tlie pistil. The edges
of the rolled leaf unite, and form the part to which the seeds
are attached, and the seam opposite is the midrib of the leaf.

135. When a pod opens only along the inner suture, it is
called a Follicle.

FOLLICLE.

136. The peculiar pod of the Mustard family is called a
Silique.

THE SEED.

87

137. The fruit of the Pines, Spruces and the like, is
called a Strobile or Cone. These cones consist of a collection
of open pistils on a long receptacle, each bearing one or two
naked seeds on its edges, near the base.

LESSON XIII.

THE SEED.

138. The seed consists of two things, a miniature plant
called th6 Embryo, and a quantity of starch which surrounds
this embryo and furnishes it food.

139. Soak a bean in warm water a few hours, or put it
in warm, moist earth for a day or two, and then examine it.
You will plainly see the little plant nicely packed in its
store-house of food.

SEWALL S BOTANY.

GERMINATING BEAN.

140. This starch is slowly converted into sugar, and^
when it is thus changed, is. dissolved, and the little plant
feeds upon and consumes it. Then the plant is able to
obtain its food from the earth and air.

LESSON XIV.

HOW PLANTS GROW.

141. A plant grows from the seed, becomes an herb, a
shrub or a tree, matures seeds, and these seeds in turn pro-
duce other plants.

HOW PLANTS GKOW.

89

GERMINATING PLANT.

142. The increase of a living thing in size and substance
is called Growth.

143. If we examine a leaf, or any part of a plant, with a
microscope of high power, we find that it is made up of
Cells. These cells are from one-thirtieth to one-thousandth
of an inch in diameter, commonly from -^ to tio" of an inch.
Thus there are commonly, from twenty-seven million to one
hundred and twenty-five million cells in a cubic inch.

90

SEWALL'S BOTANY..

144. The botanist observes three steps in all vegetable
growth :

First, the growth of each cell until it attains its full size;
Second, the multiplication of the cells' in number; and,
Third, the arrangement of these cells in some regular order,
thus producing^ definite forms.

145. This collection of cells constitutes what the botanist
calls Cellular Tissue ; and when the walls of the cells become
thick and hard, they form the* Wood. This woody material
is ari;anged in two different ways, making two kinds of
woody stems.

146. One kind we see in the Coru-stalk ; the other in the
Oak and Maple— -in fact, in all our common trees. The
former is called the Endogen,or ^^ Inside Grower;" the latter
the Exogen or " Outside Grower."

EXOGENOUS STJEM,

HOW PLANTS GBOW.

91

ENDOGENOUS STEM.

147. In the Endogen we find the oldest and hardest
fibers of the wood next to the surface^ and the newest, softest
fibers at or near the center,

148. In the Exogen we find a layer of new, soft wood on
the outside or surface of tlie stem, and the hardest, oldest
wood inside, toward the center.

149. A layer or circle of wood is added each year ; so
that by counting these circles we can determine the age of
the' tree.

150. Each of these kinds of stems has these characteris-
tics : 1st, the Endogen grows from the inside j 2d, it bears

92 sewall's botany.

parallel-veined leaves; 3d, its seeds produce but one seed leaf.

151. 1st, the Exogen grows by additions to the outside ;
2d, it beairs net-veined leaves ; 3d, its seeds produce two
seed leaves.

152. In the exogen the livmff parts of the plant are, the
rootlets at one extremity, the, bud and leaves at the other ;
and these are connected by two contiguous zones of the new-
est or latest growth, one of wood and one of bark. These
parts of the tree are renewed every year.

LESSON XV.

THE CHEMICAL COMPOSITION OF PLAKTS.

153. If we completely burn a leaf or bit of wood, almost
all of it disappears into and becomes a part of the air.
Nothing but the ash (ashes) remains. This ash is the part
of the plant that came from the earth. The part that dis-
appeared in the air, amounting to from eighty-eight to ninety-
nine per cent., is the part that came from the air.

154. The plant, then, feeds upon the earth and air. It
converts the lifeless, inorganic elements into living or organic
things.

155. In the foregoing lessons we have had under consid-
eration only the higher classes of plants. There are others,
of lower grades, called Cryptogamous or Flowerless Plants ;
such are the Ferns, Mosses, Sea-weeds, Mushrooms, etc.
These are more difficult to study, but to the advanced student
in Botany are intensely interesting.

suggestions,
Model Lessons

AND

EXAMPLES.

SUGGESTIONS.
MODEL LESSONS AND EXAMPLES.

This little work is intended for a text-hook. The teacher,
with the aid of specimens of plants or parts of plants, can
elaborate the text — preach the sermon. The book does not
treat of details of any one of the subjects, but aims to fix in
the mind of the pupil the general outline, the main points of
each topic.

It is better to study plants to get a knowledge of Botany^
than to study Botany (the book) to get a knowledge of
plants. Everything that the book teaches about plants
(except the names) may be learned by studying the plants
themselves. The book may also assist the pupil, by directing
him how and where to find things. It will also lead him to
follow some systematic order, so that what he learns shall
not be to him a mass of disconnected, unrelated facts, but an
harmonious whole.

Let the pupil bring leaves, such as he can find, and study
their forms. Let him examine them as to their general out-
line^ hase^ margin, apex, and compare them with the cuts or
figures in the book.

He will soon learn that several of the names used m
describing leaves, may apply to one and the same leaf j as,

96 sewall's botany.

for instance, a leaf may be lanceolate as to its general outline,
while the base may be more or less cordate or sagittate, its
apex acute or.acuminate, its margin dentate or serrate, etc.

Again, he will find kaves that do not correspond exactly
to any one of the forms mentioned, and to describe which
would require such terms as linear-oblong, oblong-lanceolate,
lance-linear, roundish-ovate, broadly linear, oblong-ovate.
These and many other such compound names are used by
the botanist in describing leaves. The pupil might find it
difficult, for instance, to tell whether the leaf of the common
Lilac is cordate or ovate ; the botanist describes it as cordate-
ovate.

Let the pupil bring leaves, stems of various forms, flowers,
fruit, in fact anything that will assist him to understand the
subject in hand.

In the closing pages of this Appendix I have given
examples of the different leaf-forms, and of the several
parts of the plant spoken of in the text. They are given
as examples simply, only a few of the many. The teacher
inay find others that are better. I have endeavored to give
3uch as are familiar, and the examples of leaf-forms are
typical, that is, each is quite exactly of the form indicated
by the name. For instance, there are many leaves that are
somewhat lanceolate or cordate or ovate — not exactly
lanceolate or cordate Or ovate, but approaching these forms.
The ex^^mples given have such forms as would readily be
recognized by comparing them with the figures in the hook.

The numbers accompanying these examples correspond
with, ajid relate to, the paragraphs in the text.

I herewith append a suggestive lesson or two, that may

MODEL LESSONS. 97

serve to assist the teacher in the use of the book. I do not
suppose that every teacher will pursue exactly my plan ; at
the same time, these lessons may be helpful in indicating the
manner in which the text may be expounded to the edifica-
tion and profit of the pupil. The length of a lesson, of
course, will depend upon the age and capacity of the pupil,
and the time given to a recitation.

Suppose the lesson is about Buds. (The time Spring,
before the leaves have appeared.)

Ask the pupils to bring a quantity of small twigs or
" brush." It makes little difference what they are taken
from ; any tree or shrub will furnish the specimens. It
would be better if the specimens were somewhat branching.

Each pupil in the class having taken one of these branching
twigs, or bits of brush, ask one what he sees on the end of
each branch or stem. He will in all probability answer,
"A bud."

Ask him if he finds buds anywhere else on the stem or
branch ; and he will be very likely to find them along the
sides of the stem.

As he finds buds on the ends of the stems or branches,
you may tell him to call these "end buds," or "terminal
buds;" but be sure he understands why they are called
terminal, and if he cannot understand this, let him call them
"end buds."

Let him call the buds he finds on the sides of the stem and
branches, side or lateral buds, because they grow on the sides
of the stem. Then proceed to examine more carefully the
exact place of the buds. Ask if they are arranged in any
regular order. Call his attention to the places where the

98 SEWALL'S B0TA2ST.

leaves grew the summer before. These places are seen as
scars just at the base of the bud.

Then tell him to call these buds axillary huds^ because
each grows in the axil of the leaf, if, as before, he under-
stands what and where the axil of the leaf is.

Call attention to the size of the end buds and the side
buds, and ask him to compare one kind with the other, and
see if one is larger than the other.

If he has a twig of Maple or Hickory, you will ask him to
observe that the end bud is larger and stronger than the
lateral or side ones ; and if the main stem of his specimen
has branches, ask him to compare the end bud on a branch
with the end bud of the main stem. Ask him to notice that
the end bud of the main stem is larger than the end buds of
the branches.

Having fixed the places of the buds, next ask him to
examine a bud carefully, to see what it is made up of. If
the bud is somewhat developed — that is, has begun to
expand, — he can readily see the small scale-like leaves, and
that these small scale-like leaves are attached to a short
stem. Perhaps he may be able to count the number of leaves
in the bud. Ask him how the bud would appear if the
leaves were arranged much farther apart, or the stem made
longer while the number of leaves remained the same. In
this way you may show how the bud develops into a
branch.

You may further illustrate the matter by arranging a
number of disks or bits of paper on a rubber cord; then,
taking hold of the ends of the cord and stretching it, the
bits of paper will be drawn further apart, just as the leaves

MODEL LESSONS. 99

in the bud are separated widely from each other by the
elongation of the stem.

The stem may grow five or six feet in a single season ; but
it will bear no more leaves than were contained, or were
packed, in the lud.

Call attention to the flower bud — to the different manner
of its development. The axis or stem of the flower bud
remains short. The leaves expand or grow large, differing
from the leaves of the foliage bud inform and color.

Again, call attention to the fact that the character of the
buds determines the character or form of the tree as a whole.
If the end or terminal bud is much larger and stronger than
the side, lateral or axillary buds, the tree will have a straight
central shaft, extending from the ground to the very top.
The terminal bud develops and continues the main stem,
and the axillary buds produce the branches. The Hickory,
Pine, Spruce, are good examples.

On the other hand, if there is little or no difference in the
size of the buds, the tree will not have a main central axis,
but the branches will divide and subdivide, until the whole
top of the tree is a vast collection of small twigs. The Elm
is a good and familiar example.

Now the buds of a single branching limb will tell you at a
glance whether it is from a tree of the Hickory kind or from
a tree of the Elm kind.

Suppose the lesson is about Fruit, Call attention to the
definition of fruit, as given in paragraph 123.

Keep the fact in mind that the pistil, of which th^ ovary
is a part, is a form of leaf, and that if a flower has a number
of simple pistils, it will produce or ripen a cluster of simple
fruits, each pistil producing a single fruit.

100 sewall's botany.

The Blackberry blossom has many simple pistils, the
ovaries of which become simple fruits ; and as the pistils are
borne on the stem, or receptacle, of the flower, so will each
of the fruits be borne on the stem, or receptacle.

Let the pupil see and understand that the Blackberry is
really a collection of blackberries on an enlarged and pulpy
or juicy stem, and that we pluck and eat this stem with the
simple berries upon it.

In the Raspberry, the fruits, the ripened ovaries, grow
upon a smaller stem or receptacle ; but when we pluck the
Raspberry, or rather the collection of berries, these berries
are detached from the stem, and we eat the berries only.

If the stem or receptacle of the Blackberry were to become
thickened and enlarged much more than it is, and the real
fruits, the ripened ovaries, were thin and dry, and each
adhering closely to the small seed, we should have the form
and structure of the Strawberry.

On the other hand, if the receptacle of the Strawberry
were smaller, and the real fruits (commonly called seeds)
were enlarged, the walls of the ovaries (which e^iclose the
seeds) becoming thick and juicy, we should have the form
and structure of the Blackberry.

Call attention to the apple blossoms. Observe that the
petals fall off, and the stamens wither away, while the calyx
grows thick and juicy, and becomes that part of the apple
that we eat. The pistil becomes the core, or real fruit, con-
taining the seeds.

The same general plan may be pursued with any of the
subjects treated of;

EXAMPLES. 101

8. Examples of Stipules.

Apple, Clover, Locust, Pea.

9. Examples of Sessile Leaves,

Locust, Purslane, Lead-Plant, Bur Marigold.

12. Examples of Parallel-veined Leaves,

Lily of the Valley, Corn, Grasses and Grains.*-

13. Examples of Netted-veined Leaves.

Maple, Pea, Bean, Squash.

14. Examples of Feather-veined Leaves.h

Elm, Oak, Apple.

15. Examples of Madiate-veined Leaves.

Maple, Button-wood, Pumpkin, Cucumber.

17 Examples of Leafforms^ as to Greneral Outline.
LiNEAB : Spring Beauty, the Grasses, Oats, Wheat.
Lanceolate: False Flax, Peach, Pink, some Violets.'
Oblong: Horse-radish, White Clover, Red Cherry.'
Elliptical : One of the Magnolias, Sweet Buckeye, Bouncing

Bet.
Oval : Touch-me-not, Red Clover, Black Thorn.
Ovate : Raspberry, Blackberry, Pear.
Oebiculae : Golden Saxifrage, Twin-flower, Arrow-wood.
Oblanceolate : Lupine, Cherry, Laurel.
Spatulate : Wild Daisy, Valerian, Hound's-tongue.
CuNEATE : Hop-clover, False Indigo, Hawthorn.

18. Examples of Leafforms^ as to the Base.
Cordate : Common Blue Violet, Pansy, Hollyhock.

102 sewall's botany.

Renifoem : Marsh Marigold, Wild Ginger, Mallow.
AuBicuiiATE : Sheep Sorrel, Magnolia (one species).
Sagittate : Arrow-head, some of the Mustards, Knot- weed.
Peltate : Water-shield, White Lily, Mandrake.t
Hastate: Sorrel, Buckwheat, Joint-weed.

19. Examples of Leaf-forms^ as to the Apex,
Acuminate : Mountain Ash, Fuchsia, Water-parsnip.
Acute : Choke-cherry, Wild Rose, Sheep-berry.
Obtuse: Golden Aster, Pawpaw, Rue.
Truncate : Whitewood, Sweet-scented Clover, Vetch.
Retuse : Yellow Clover, Tares, Bladder Senna.
Obcordate : White Clover, Wood-sorrel, Scorpion, Senna^

20. Examples of Leafforms^ as to the Margin.
Entire: Flax, Quince, Elecampane.

Serrate : Basswood, Black Cherry, Iron-weed.

Dentate : Wild Snakeroot, Groundsel.

Crenate: Twin-flower, Ground-ivy, Catnip.

Repand : Laurel Oak, and some other species of the Oak.

Sinuate : False Violet, Evening Primrose, Pennywort.

Incised : Fire Weed, some of the Maples.

^LoBED : Liver-leaf, Sugar Maple.
Cleft : Washington Thorn, Burdock, Vervain.
Parted : Elder, and some of the Anemones.

^Divided: Water-leaf, Strawberry.

21.<

23. Examples of Compound Feather-veined Leaves,
Prairie Clover, Locust, False Indigo, Walnut.

23. Examples of Compound Radiate-veined Leaves,
Horse-chestnut, Sweet Buckeye, Five-finger,

EXAMPLES. 103

24. JExamples of Perfoliate Leaves.

Bellwort, Honeysuckles, Boneset.

44. Examples of the Boot-stock.

Blue Flag, Solomon's Seal, Wake-robin, Bellwort.

45. Examples of the Tuber.

Common Potato, Articlioke, Sweet Potato,

46. Examples of the Oorm.

Crocus, Putty-root, Gladiolus.

47. Examples of the Bulb.

Lily, Onion, Hyacinth, Tulip.

50. Examples of the Stolon.

Hobble-bush, Black Raspberry, Gooseberry.

61. Examples of the Bunner.

Strawberry, Five-finger, Bugle-weed.

52. Examples of the Tendril.

Grape vine. Cucumber, Squash, Virginia Creeper.

57. Examples of Epiphytes (not common).

The Long or Black Moss of the Southern States,
Lichens, and some Mosses. The latter are not
flowering plants, however.

58. Examples of Parasites.

Mistletoe, Dodder, Beech-drops, Pine-sap.

65. Examples of the Baceme.

Common Locust, Currant, Choke Cherry.

104 sewall's botany.

66. Examples of the Corymh.

Hawthorn, Cockspur, Haw, Pear.

67. Examples of the Umbel.

Milkweed, Primrose, Caraway, Parsnip.

68. Examples of the Spike.f

Mullein, PlaDtain, Vervain, Grasses (compound).

69. Examples of the Head.

Button-ball, Button-bush, Dandelion, Thistle.

71. Examples of the Panicle.

Catalpa, Oat, and the common Grasses.

73. Examples of the Cyme.

Bladder-nut, Ohickweed, Spearmint, Horsemint.

74. Examples of the Fascicle.

Sweet- William, Lychnis.

75. Examples of the Grlomerule.

Hoarhound, Motherwort.

87, 89. Examples of Perfect Flowers.

Flax, Geranium, Rose, Pink. These are also regu-
lar flowers.

90, 92, 93. Examples of Imperfect Flowers.
Dioecious : Willow, Poplar, Moonseed.
MoNCECious: The Oak, Walnut, Nettle.

94. Examples of Incomplete Flowers.
Castor-oil Plant, Windflower.
Naked : Willow, Lizard's-tail.

EXAMPLES. 105

95. Examples of Irregular Flowers.

Dutchman's Breeches, Lark-spur, Violet.

115. Examples of Simple Pistils,

Peony, Lark-spur, Marsh Marigold, Pea, Bean.

115. Examples of Compound Pistils.
Blue Flag, Spiderwort, Apple.

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