Publication 976 May 1956 A Check List of Plant Rusts in Canada by A. M. Brown uSSstf B\0& S255S&9* ^S5se^ m$go| Canada Department of Agriculture Ottawa, Ontario 5:56 A Check List of Plant Rusts in Canada by A. M. Brown Plant Pathology Laboratory Winnipeg, Manitoba Botany and Plant Pathology Division Canada Department of Agriculture Ottawa, Ontario FOREWORD This check list of the Plant Rusts in Canada has been prepared from records published up to 1952. Many of the rusts have been recorded for the same area in more than one publication and for this reason some of the records have been omitted. The rusts are arranged in alphabetical order and the epithets have been taken mostly from the Manual of the Rusts in United States and Canada by J. C. Arthur. The names of the hosts are followed by the names of the provinces or other regional areas in which the rusts were collected and these, in turn, are followed by reference numbers. These numbers refer to the publications from which the records were taken. A list of hosts and the rusts that may be expected to occur on them has also been included. In this list the hosts are listed more completely than in the section devoted to the rusts. The names of the hosts were taken for the most part from Grays Manual of Botany, 8th ed., but in some cases it was found advisable to follow Rydberg's Flora of the Prairies and Plains of Central North America. The names of the grass hosts were taken mostly from Hitchcock's Manual of the Grasses of the United States. A. M. BROWN Plant Pathology Laboratory Winnipeg, Manitoba in Digitized by the Internet Archive in 2012 with funding from Agriculture and Agri-Food Canada - Agriculture et Agroalimentaire Canada http://www.archive.org/details/checklistofplantOObrow SUPPLEMENTARY NOTE Mr. Brown's UA Check List of Plant Rusts in Canada" is compiled for the most part from published records, but he has included some of his own observa- tions as well. In some instances records of certain rusts and significant host and range extensions of other species given in the annual reports of the "Canadian Plant Disease Survey" or other publications have been overlooked. Also, since Mr. Brown compiled his list several comprehensive studies on the taxonomy of rusts occurring in Canda have appeared. To increase the usefulness of the list, the text covering certain species was revised and the pertinent publications have been added as an addendum to the references. Besides, in the interests of greater clarity, notes about a few rusts have been added in parentheses. I. L. Conners Senior Mycologist THE PLANT RUSTS AND THEIR HOSTS For each rust are shown the known stages, the hosts on which they have been collected, the province, territory or district in which the collections have been made and one or more references to the literature. Aecidium columbiense Ell. & Ev. O-I On Hieracium albiflorum Hook.; B.C. (1). Aecidium graebnerianum P. Henn. (See also Puccinia praegracilis) I On Habenaria dilatata (Pursh) Hook; Que. (29). H. gracilis Wats.; B.C. (1). H. psychodes (L.) Sw.; Que. (29). Habenaria sp.; N. S. (29). Aecidium ligustici Ell. & Ev. O-I On Ligusticum scothicum L.; Que. (1). Aecidium mitellae Ell. & Ev. I On Mitella nuda L.; Nfld. (1). Chrysomyxa arctostaphyli Diet. Ill On Arctostaphylos urva-ursi (L.) Spreng. ; B.C., Alta., Yukon, Sask. (1), Man. (2), Mack., Ont., Que. (27). Chrysomyxa cassandrae (Peck & Clint.) Tranz. (See C. ledi var. cassandrae) Chrysomyxa chiogenis Diet. O-I On Picea glauca (Moench) Voss; Ont. (culture) (32). P. mariana (Mill.) B.S.P.; Ont. (culture) (32, 35). II-III On Chiogenes hispidula (L.) T. & G.; B.C. (35), Ont., Que., N.S. (27), Nfld. (1, 35). Chrysomyxa empetri (Pers.) Schroet. O-I On Picea engelmanni (Parry) Engelm.; B.C. (27). P. glauca (Moench) Voss; Que. (33), N.S. (27), Nfld. (35). P. rubens Sarg.; Que. (culture) (33). II-III On Empetrum nigrum L.; B.C., Que. (1), Alta., N.S., Nfld. (33)% Yukon, Mack., Frank., Man. (27), Keew., Labr. (35). E. atropurpureum Fern. & Wieg. ; Que. (33). E. eamesii Fern. & Wieg.; Nfld. (33). Chrysomyxa ledi (Alb. & Schw.) de Bary O-I On Picea mariana (Mill.) B.S.P.; Sask., Ont., N.S. (1) P. pungens Engelm.; Ont. (1) P. rubens Sarg.; Ont., N.S. (1) C. ledi var. cassandrae (Peck & Clint.) Savile O-I On Picea glauca (Moench) Voss; N.S. (27). P. rubens Sarg.; N.S. (27). II-III On Chamaedaphne calyculata (L.) Moench; Man., Ont., N.S. (1), Yukon, Mack., Que. (27). C. ledi var. glandulosi Savile O-I On Picea engelmanni (Parry) Engelm.; B.C. (35) II-III On Ledum glandulosum Nutt. ; B.C. (35) 72559—2 C. ledi var. groenlandici Savile 0-1 On Picea mariana (Mill.) B.S.P.; N.S. (27). P. rubens Sarg. ; N.S. (27). II-III On Ledum groenlandicum Oeder; B.C., Sask., Ont., N.S. (1), Mack., Que. (27), Alta., Nfld. (35). C. ledi var. ledi II-III On Ledum palustre L. var. decumbens Ait.; Mack. (35). C. ledi var. rhododendri (de Bary) Savile II-III On Rhododendron lapponicum L.; Mack. (27), B.C., Man., Nfld. (35). C. ledi var. vaccinii Ziller II-III On Vaccinium parvifolium Smith; B.C. (35). Chrysomyxa ledicola (Peck) Lagerh. O-I On Picea engelmanni (Parry) Engelm.; Alta (1) P. glauca (Moench) Voss (P. canadensis (Mill.) B.S.P.); Alta., Sask., Que., N.B., N.S. (1), Man. (2), Mack., Ont. (27), B.C., Nfld. (35). P. glauca var. albertiana (S. Brown) Sarg. ; Yukon (27), B.C. (35). P. mariana (Mill.) B.S.P.; Alta., Man., Que., N.S., Nfld. (1), Sask., Ont. (2). P. pungens Engelm.; Ont. (1), Alta., Man., Que., P.E.I. (27). P. rubens Sarg.; N.S., P.E.I. (1), Que. (27). P. sitchensis (Bong.) Carr. ; B.C. (35). II-III On Ledum groenlandicum Oeder; B.C., Alta., Yukon, Sask., Man., Nfld. (1) Mack., Que. (27). L. palustre L. var. decumbens Ait.; Labr. (1), Yukon, Mack., Frank., Keew. (27). Chrysomyxa monesis Ziller O-I On Picea sitchensis (Bong.) Carr.; B.C. (36). II-III On Moneses uni flora (L.) Gray; B.C. (35, 36). Chrysomyxa pirolata (Koern.) Wint. (C. pyrolae (DC.) Rostr. nom. nud.) O-I On Picea glauca (Moench) Voss (P. canadensis (Mill.) B.S.P.); Man. (1), Ont., Que., N.S. (27), Mack. (35). P. glauca var. albertiana (S. Brown) Sarg.; B.C. (27). P. mariana (Mill.) B.S.P.; B.C., N.S. (27). II-III On Moneses uniflora (L.) Gray.; Alta., Que. (1), Man. (27). Pyrola americana Sweet; N.S. (1), Man. (2), B.C., Sask., Ont., Que. (27). P. asarifolia Michx.; B.C., Sask. (1), Man. (27). P. bracteata Hook.; B.C. (1). P. chlorantha Sw.; (P. virens Schweigg.), Alta. (1), Mack., Que. (27), B.C. (35). P. elliptica Nutt.; Alta. (1), Man., Que., N.S. (27). P. grandiflora Radius; Yukon, Keew., Frank. (27). P. minor L.; Que. (27). P. picta Smith; B.C. (35). P. secunda L.,; Que., Nfld. (1), B.C., Mack., Alta., Man. (27). P. uliginosa T. & G.; N.S. (1). Chrysomyxa weirii Jacks. Ill On Picea engelmanni (Parry) Engelm.; B.C. (1). P. rubens Sarg. ; N.B. (9). P. sitchensis (Bong.) Carr. ; B.C. (27). Picea sp.; N.S. (27). Chrysomyxa woronini Tranz. O-I On Picea glauca (Moench) Voss; Que. (27), B.C., Nfld. (35). P. mariana (Mill.) B.S.P.; Nfld. (35). Ill On Ledum groenlandicum Oeder; Nfld. (35). L. palustre var. decumbens Ait.; Yukon (27). Coleosporium campanulas (Pers.) Lev. II-III On Campanula rapunculoides L. ; Que. (15), Ont. (14) C. persicifolia L.; B.C. (7). Campanula spp.; B.C. (7), N.S. (23), Ont. (13). Coleosporium madiae Cooke II-III On Madia saliva Molina; B.C. (1). Coleosporium solidaginis (Schw.) Thuem. O-I On Pinus banksiana Lamb.; Alta., Man., Sask. (25), Que. (6). P. contorta Dougl.; Alta. (1). II-III Common on Aster spp. and Solidago spp. in most provinces. Coleosporium viburni Arth. II-III On Viburnum cassinoides L.; Ont. (1), N.S. (14), N.B. (13). V. lentago L.; Man., (3), Ont. (14). Cronartium coleosporioides (Diet. & Holw.) Arth. O-I On Pinus contorta Dougl.; Que., N.B. (21), B.C. (1). P. ponderosa Dougl.; B.C. (1). Cronartium comandrae Peck O-I On Pinus banksiana Lamb.; Alta. (1), Sask. (2), Ont. (5). P. contorta Dougl.; Alta. (1). P. ponderosa Dougl.; B.C. (1). Pinus spp.; Man. (21). II-III On Comandra livida Richards.; Man. (2), Que. (1). C. pallida A. DC; Alta., Sask. (25), B.C., N.W.T. (1), Man., Sask. (2). C. umbellata (L.) Nutt.; Ont., Que. (1). Cronartium comptoniae Arth. O-I On Pinus banksiana Lamb.; Man., Ont. (2). II-III On Myrica gale L.; B.C., N.S., Ont. (1). Cronartium flaccidum (Alb. & Schw.) Wint. Ill On Impatiens balsamina L.; P.E.I. (1). Cronartium ribicola ]. C. Fisch. O-I On Pinus spp.; B.C., Que., N.S., P.E.I. (12). II-III On Grossularia spp.; Man. (15), N.S. (22), P.E.I. (20), B.C. (18). Ribes spp.; B.C., Que., N.B., P.E.I. (12), Man., Ont. (15). Cumminsiella sanguinea (Peck) Arth. O-I-II-III On Mahonia sp.; B.C. (18), Que., Ont. (21). Endophyllum sempervivi (Alb. & Schw.) de Bary. O-III On Sempervivum teetotum L.; Ont., B.C. (6). 72559—2* Frommea obtusa (Strauss) Arth. O-I-II-III On Potent ilia canadensis L.; N.S., Ont. (1). Gymnoconia peckiana (Howe) Trott. O-I-III On Rnbn s acaulis Michx.; Sask. (2). R. articus L.; Sask. (25), Alta. (1). R. nigrobaccus Bailey; Ont. (1). R. randii (Bailey) Rydb.; N.S. (1). R. triflorus Richards.; Man. (2). Rabus spp.; B.C., Ont., Que., N.B., N.S. (23). Gymno sporangium aurantiacum Chev. (legitimate name G. cornutum Arth.) O-I On Sorbus americana Marsh.; Ont., N.B., Nfld. (1), Man. (2). 5. scopulina Greene; Man., Ont., Que. (1). Gyninosporangium betheli Kern O-I On Crataegus chrysocarpa Ashe.; Sask. (25), Man. (2). C. douglasii Lindl.; B.C. (1). Crataegus spp.; Morden, Man. Dr. W. L. Gordon. Ill On Juniper us scopulorum Sarg. ; Man. (16). Gyninosporangium clavariaeforme (J acq.) DC. O-I On Amelanchier alnifolia Nutt.; Man. (1). A. canadensis (L.) Medic; N.S. (1), Ont. (6). A. spicata {A. ?stolonifera Wieg.); N.S. (17). Crataegus chrysocarpa Ashe.; Sask. (25). Crataegus spp.; P.E.I., B.C. (12), Ont., Que. (23). Cydonia oblonga Mill.; N.S. (23). Pyrus communis L.; N.S. (23). Ill On Juniperus communis L. var. depressa Pursh; Ont., Que. (5), N.S. (4). /. communis L. var. hibernica Gord.; P.E.I. (10). J. communis L.; N.S. (16). Gymnosporangium clavipes Cooke & Peck O-I On Amelanchier spp.; B.C., Man., Sask., Que., N.B., N.S., Ont., common. Aronia arbutifolia (L.) Ell.; N.B. (1). Crataegus punctata Jacq.; Ont. (1). Crataegus spp. ; Man. (2), Ont., Que., N.B., N.S. (23), Sask. (6). Cydonia oblonga Mill.; Ont., N.S. (23). Malus pumila Mill.; Ont., Que., N.B., N.S. (23). Cotoneaster sp.; Man. (20). Cydonia sp.; Ont. (16), N.S. (20). Ill On Juniperus communis L. var. depressa Pursh; Ont., Que. (5). J. horizontalis Moench; Que. (5). /. communis L.; N.S. (17), Que. (12). Juniperus spp.; Ont. (6). Gymnosporangium corniculans Kern O-I . On Amelanchier alnifolia Nutt.; Man. (1), Sask. (25). A. sanguinea (Pursh) DC; Ont. (1). Ill On Juniperus horizontalis Moench/. douglasii) Rehd. Man. (16). /. virginiana L.; Man. (16). Gymnosporangium globosum Farl. 0-1 On Crataegus coccinea L.; Ont. (1). C. punctata Jacq.; Ont. (1). C. sanguinea (Pursh) DC; Ont. (5). C. tomentosa L.; Ont., Que. (1). Crataegus sp.; Sask. (2). Malus pumila Mill.; Ont., Que. (23). Ill On Juniperus virginiana L.; Ont. (1), Que. (10). J. horizontalis Moench; Sask. (2). J. fragrans (cult.) ; Ont. (5) Juniperus spp.; Ont. (6). Gymnosporangium juniper inum (L.) Mart, (legitimate name, G. tremelloides Hartig) O-I On Sorbus occidentalis (Wats.) Greene; Alta., B.C. (11). S. scopulina Greene; B.C. (1). S. sitchensis Roem.; B.C. (1). Ill On Juniperus sibirica Burgsd.; Alta. (1). Gymnosporangium juniper i-virginianae Schw. O-I On Malus coronaria (L.) Mill.; Ont. (1). M. pumila Mill.; Ont. (23). M. sylvestris (L.) Mill.; Ont. (1). Ill On Juniperus virginiana L.; Ont. (10). Gymnosporangium juvenescens Kern O-I On Amelanchier alnifolia Nutt.; Alta. (1), Sask., Man. (25), A.florida Lindl.; B.C. (1). A. pumila Nutt.; Alta. (1). Ill On Juniperus horizontalis Moench; Sask. (25), B.C. (24). Gymnosporangium nelsoni Arth. O-I On Amelanchier alnifolia Nutt.; Alta., B.C. (1), Man. (2). A.florida Lindl.; B.C. (19). Ill On Juniperus scopulorum Sarg. ; Alta. (1), B.C. (19). Gymnosporangium nidus-avis Thaxt. O-I On Amelanchier intermedia Spach; Ont. (1). Ill On Juniperus virginiana L.; Ont. (12). Gymnosporangium nootkatense (Trel.) Arth. O-I On Malus rivularis (Dougl.) Roem.; B.C. (1). Sorbus occidentalis (Wats.) Greene; B.C. (1). Gymnosporangium tubulatum Kern O-I On Crataegus sp.; B.C. (15). Hyalopsora aspidiotus (Peck) Magn. O-I On Abies balsamea (L.) Mill.; Ont., Que. (1). II-III On Phegopteris dryopteris (L.) Fee; B.C., Ont., Que. (1). Hyalopsora polypodii (Pers.) Magn. II-III On Filix fragilis (L.) Gilib.; B.C., Ont. (1), Sask. (25). Kuehneola uredinis (Link) Arth. O-I-II-III On Rubus procumbens Muhl; Ont. (1.) R. pubescens Raf. ; N.S. (1). Melampsora abietis-canadensis (Farl.) C. A. Ludwig 0-1 On Tsuga canadensis (L.) Carr. ; N.S., Que. (1). II-III On Po pulus grandidentata Michx. N.S., Ont., Que. (1), P.E.I. (14). P. tremuloides Michx.; Ont., Que. (1). Melampsora abieti-capraearum Tubeuf O-I On Abies balsamea (L.) Mill.; Sask. (2), N.S. (1). II-III On Salix alba L. var. vitellina L.; Ont. (18). S. bebbiana Sarg.; N.B. (18). 5. Candida Flugge; Sask. (2). S. cordata Muhl.; Man. (2). S. purpurea L. var. gracilis Anderss.; Man. (14). 5. rubra Richards.; Ont. (14). Melampsora albertensis O-I On Pseudotsuga taxifolia (Poir.) Britt. (P. mucronata (Raf.) Sudw.; B.C. (1), ?B.C, Alta. (37) II-III On Populus tremuloides Michx.; B.C., Alta. (1, 37). Melampsora arctica Rostr. II-III On Salix anglorum Cham.; Alta., B.C. (1). S. arbusculoides Anders.; Alta. (1). 5. balsamifera (Hook.) Barratt; Alta. (1). 5. glaucops Anders.; Alta. (1). 5. petrophila Rydb.; Alta., B.C. (1). Salix spp.; Alta. (1). Melampsora bigelowii Thuem. O-I On Larix laricina (DuRoi) Koch.; Alta. (1). L. lyallii Pari.; Alta. (1). II-III On Salix amygdaloides Anders.; Man. (2). Salix spp.; Sask., Alta. (25), Man. (19), B.C. (5). Melampsora farlowii (Arth.) J. J. Davis III On Tsuga canadensis (L.) Carr.; N.S. (1). Melampsora lini (Pers.) Lev. O-I-II-III Common on Linum spp. Melampsora medusae Thuem. O-I On Larix laricina (DuRoi) Koch.; N.S. (1). II-III On Populus balsamifera L. (P. tacamahacca Mill.); Man. (19), Sask. (25), Nfld. (1). P. deltoides Marsh.; Man. (25). P. sargentii Dode.; Alta. (25). P. tremuloides Michx.; Man. (19), Ont. (24). Populus spp.; Man., Sask., Alta. (25), Ont. (7), Que. (14). Melampsora occidentalis Jacks. O-I On Pseudotsuga taxifolia (Poir.) Britt.; B.C., Alta. (37). II-III On Populus acuminata Rydb.; B.C. (1). P. balsamifera L.; B.C. (1), Sask. (25). P. trichocarpa T. & G.; B.C. (1, 37), Alta. (13). Melampsora ribesii- purpurea Kleb. O-I On Grossularia divaricata (Dougl.) Cov. & Britt.; B.C. (1). Ribes echinatum Lindl.; B.C. (1). II-III On Salix bebbiana Sarg. ; Alta. (24) Melampsorella cerastii (Pers.) Schroet. O-I On Abies balsamea (L.) Mill.; Man., N.B., N.S., Ont., P.E.I. , Nfld. (1), Que. (5). A. grandis Lindl.; B.C. (1). A. lasiocarpa (Hook.) Nutt.; B.C. (1). Picea engelmanni (Parry) Engelm.; Sask. (1). P. excelsa (Lam.) Link; Man. (1). P. glauca (Moench) Voss (P. canadensis (Mill.) B.S.P.); Alta., Sask., Yukon (1), Man., Sask. (2). P. glauca var. albertiana (S. Brown) Sarg. ; B.C. (1). P. mariana (Mill.) B.S.P.; Alta., Que., Nfld. (1), Man., Sask. (2). II-III On Cerastium alpinum L.; B.C. (1). C. arvense L.; Man., Sask. (25), Alta. (1). Cerastium spp.; Man., B.C. (1). Stellaria graminea L.; Ont. (24). S. longipes Goldie; Alta. (1). Melampsoridium betulinum (Pers.) Kleb. II-III On Betula populifolia Marsh.; N.S. (1). B. pumila L.; Nfld. (1). Betula sp.; Man. (25), Alta. (11). Milesia darkeri Faull II-III On Cryptogramma acrostichoides R.BR.; B.C. (1). Milesia fructuosa Faull O-I On Abies balsamea (L.) Mill.; N.S., Ont., Que. (1). II-III On Dryopteris intermedia (Muhl.) Gray; N.S., Que., Ont. (1). D. spinulosa (O. F. Muell.) Watt.; Que. (1). Milesia marginalis Faull & Wats. O-I On Abies balsamea (L.) Mill.; Ont. (1). II-III On Dryopteris marginalis (L.) Gray.; Ont., Que. (1). Milesia polypodophila (Bell) Faull O-I On Abies balsamea (L.) Mill.; N.S., Ont., Que. (1). II-III On Polypodium virginianum L. ; N.S., Ont., Que. (1). Nyssopsora clavellosa (Berk.) Arth. Ill On Aralia nudicaulis L.; N.S., N.B., Ont., Que., Nfld. (1), Sask., Man. (2). Phragmidium americanum (Peck) Diet. O-I-II-III On Rosa blanda Ait.; Ont. (1). R. virginiana Mill.; N.S., Ont. (1). Rosa spp.; Ont. (1), Que. (14), N.B., N.S. (23). Phragmidium andersoni Shear I-II-III On Dasiphora fruticosa (L.) Rydb. (Potentilla f. L.); Alta., B.C., N.B., Ont. (1), Man., Sask. (2), Que. (14). Phragmidium disciflorum (Tode) J. F. James (legitimate name, P. mucronatum (Pers.) Schlecht.) O-I-II-III On Rosaspp., N.B. (1), B.C., Que., N.S. (23), Ont. (14), Man. (25). Phragmidium subcorticinum (Schrank) Wint. Reported from Kentville N.S. (14), Ont. (20). On Rosa spp. Spore stage in doubt. 8 Phragmidium ivesiae Syd. I-II-III On Potentilla bipinnatifida Dougl.; Man. (2). P. nuttallii Lehm.; Alta. (1), Sask. (2). Potentilla spp.; Alta. (1), Alta., Sask. (25). Phragm idium montivagum Arth . O-I-II-III On Rosa blanda Ait.; Man. (25). R. bourgeauiana Crepin; Alta. (1). Rosa sp.; Man. (25). Phragmidium occidentale Arth. O-I-II-III On Rubus parviflorous Nutt.; B.C. (1). Phragmidium potentillae (Pers.) Karst. O-I-II-III On Potentilla spp.; N.W.T., Alta., Man., Sask., Nfld. (1). Phragmidium rosae-acicularis Liro O-I-II-III On Rosa spp.; Alta., B.C., Ont., Man. (1). Phragmidium rosae-arkansanae Diet. O-I-II-III On Rosa suffulta Greene; Alta. (1). II-III On Rosa sp.; Sask., Alta. (25). Phragmidium rosae-californicae Diet. O-I-II-III On Rosa spp.; B.C. (1). Phragmidium rosae-pimpinellifoliae Diet. O-I-II-III On Rosa spp.; Que., P.E.I. (23). Phragmidium rosicola (Ell. & Ev.) Arth. Ill On Rosa suffulta Greene; Alta. (1). Rosa sp.; Sask. (1). Phragmidium rubi-idaei (DC.) Karst. O-I-II-III On Rubus spp.; Alta., B.C., Man., N.B., N.S., Ont., Sask., Que., Nfld. (1). R. idaeus L. var. strigosus Maxim.; Man. (2). R. occidentalis L.; Nfld. (1). Phragmidium rubi-odorati Diet. I-II-III On Rubus odoratus L.; Ont. (1). Phragmidium speciosum (Fries) Cooke O-I-III On Rosa blanda Ait.; N.S. (1). R. macounii Greene; Sask. (2). R. virginiana Mill.; N.S. (1). Rosa spp. ; Man., Sask., (25) Alta., Ont., Que., N.B., N.S. (23). Pileolaria toxicodendri (Berk. & Rav.) Arth. O-II-III On Rhus aromatica Ait.; Ont. (1). R. radicans L.; Man., Ont., Que. (1). (R, toxicodendron auct.); Man. (2), Que. (13). Puccinia absinthii (Hedw.f.) DC. II-III On Artemesia cana Pursh; Sask., Alta. (25). A.frigida Willd.; Sask., Alta. (25), Man. (6). A. gnaphalodes Nutt.; Man. (2). A. ludoviciana Nutt.; B.C. (1). Puccinia adoxae (Hedw.f.) DC. Ill On Adoxa sp.; Alta. (26). Puccinia albulensis Magn. Ill On Veronica alpina L. var. unalaschcensis C. & S. (V. wormskjoldii R. & S.); B.C. (1). Puccinia amphigena Diet. O-I On Maianthemum canadense Desf. ; Sask. (2). Nemexia lasioneuron (Hook.) Rydb.; Man., Sask. (25). Smilacina stellata (L.) Desf. ; Sask. (25) Smilax herbacea L. ; Man. (2). II-III On Calamovilfa longifolia (Hook.) Hack.; Man. (2). Puccinia andropogonis Schw. P. andropogonis var. micropunctata Arth. O-I On Castilleja sessiliflora Pursh; Sask. (2). P. andropogonis var. melampyri Arth. O-I On Melampyrum lineare Lam.; Ont. (1). P. andropogonis var. onobrychidis Arth. O-I On Lupinus perennis L.; N.S. (1). Petalostemon candidus (Willd.) Michx.; Man. (2). P. purpureus (Vent.) Rydb.; Man. (2). P. andropogonis var. pentstemonis Arth. O-I On Pentstemon acuminatus Dougl.; Sask. (1), Man. (2). P. albidus Nutt.; Sask. (2). P. eriantherus Pursh; Sask. (2). P. nitidus Dougl.; Sask. (2). P. andropogonis var. polygalina Arth. O-I On Polygala senega L.; Man. (2). P. andropogonis var. pustulata Arth. O-I On Comandra pallida A. DC; Man. (2). C. umbellata (L.) Nutt.; Ont. (1), Man. (2). II-III On Andropogon provincialis Lam.; Ont. (1). A. scoparius Michx.; Man., Sask. (2). Puccinia anemones -virginianae Schw. Ill On Anemone canadensis L.; Man., Sask. (2). A. riparia Fern.; Man. (16). A. virginiana L.; Ont., Que. (1). Puccinia angelicae (Schum.) Fuckel II-III On Zizia aurea (L.) Koch; Man. (25). Puccinia angustata Peck O-I On Lycopus americanus Muhl.; Ont.(l). L. asper Greene; Sask. (25). L. rubellus Moench; Ont. (1). Lycopus spp.; N.B., Ont. (1). Mentha arvensis L.; N.S. (1). M. canadensis L. ; Man. (1). M. glabrior (Hook.) Rydb.; Man. (25). Senecio triangularis Hook.; B.C. (1). II-III On Eriophorum angustifolium Roth.; Sask. (25). E. viridicarinatum (Engelm.) Fern.; B.C. (1). Scirpus atrovirens Muhl.; Ont., Que. (1), Man. (25). S. cyperinus (L.) Kunth.; N.S., Que., Ont. (1). S. microcarpus Presl; Man. (25), Sask. (2). 72559—3 10 Puccinia antirrhini Diet. & Holw. II-III On Antirrhinum majus L.; all provinces except Nfld. (23). Puccinia arabicola Ell. & Ev. O-I-III On Cardamine douglasii (Torr.) Britt. ; Ont. (1). Puccinia arenariae (Schum.) Wint. Ill On Honkenya peploides (L.) Ehrh.; N.S. (1). Merckia physodes Fisch.; N.W.T. (1). Moehringia lateriflora (L.) Fenzl; Sask. (2). Stellaria longifolia Muhl.; Sask. (2). 5. longipes Goldie; Alta. (1), Sask. (2). Puccinia areolata Diet. & Holw. O-I-II-III On Caltha leptosepala DC; B.C., Sask. (1). Puccinia argentata (Schultz) Wint. O-I On Adoxa sp.; Alta. (26). II-III On Impatiens biflora Walt.; Sask. (2). I. pallida Nutt.; Alta. (1). /. noli-tangere L. ; Alta. (26). Puccinia aristidae Tracy O-I On Triglochin maritima L.; Alta. (1), Sask. (2). Polygonum erectum L.; Sask. (2). P. neglectum Bess.; Sask. (2). Chenopodium album L.; Alta. (1), Man., Sask. (2). Sarcobatus vermiculatus (Hook.) Torr.; Sask. (2). Spinacia oleracea L.; Alta. (1). Cheirinia cheiranthoides (L.) Link; Sask. (2). Draba lutea Gilib.; Alta. (1). Sisymbrium altissimum L. ; Sask. (2). Thlaspi arvense L.; Sask. (2). Glaux maritima L.; Sask. (1) Lappula echinata Gilib.; Man. (2). Plantago eriopoda Torr.; Sask., Alta. (2). II-III On Distichlis spicata (L.) Greene; Alta. (1), Man., Sask/(2). Puccinia asarina Kunze III On Asarum caudatum Lindl.; B.C. (1). Puccinia asparagi DC. O-I-II-III On Asparagus officinalis L.; Man., Sask. (2), B.C. (12), Que. (11), Ont. (13), N.S. (10), N.B. (5), P.E.I. (3). Puccinia aster is Duby III On Aster cordifolius L.; Ont. (2). A. ericoides L.; Sask. (2). A. laevis L.; Sask. (25). A. lindleyanus T. & G. ; Man. (2). A. novae-angliae L.; Man. (25) Ont. (14). Psilactis aster oides Gray; Nfld. to B.C. (1). Puccinia atrofusca (Dudl. & Thomp.) Holw. O-I On Artemesia biennis Willd.; Alta. (1). A. camporum Rydb.; Alta. (1), Sask. (2). A. caudata Michx.; Alta. (1). A.frigida Willd.; Alta. (1). 11 A. glauca Pall.; Sask. (2). A. gnaphalodes Nutt. ; Man., Sask., Alta. (2). A. purshiana Bess.; Alta. (1), Sask. (2). II-III On Carex douglasii Boott; Alta. (1), Man. (2). C. eleocharis Bailey; Yukon (1). C.filifolia Nutt.; Alta. (1), Sask. (2). C. praegracilis Boott; Man. (2). C. rossii Boott; B.C. (1). Puccinia atropuncta Peck & Clint. II-III On Zygadenus chloranthus Richards.; Sask. (2), Ont. (1). Puccinia balsamorhizae Peck O-I-II-III On Balsamorrhiza sagittata (Pursh) Nutt.; B.C. (1.) Puccinia bardanae (Wallr.) Cda. O-I-II-III On Arctium minus Schk.; N.S., Ont. (1), Man. (2). Puccinia bistortae (Strauss) DC. II-III On Bistorta vivipara (L.) S. F. Gray; Alta., Ont. (1), Que. (6). Puccinia blasdalei Diet. & Holw. O-I-II-III On Allium textile N. & M.; Alta. (1). Puccinia bolleyana Sacc. II-III On Carex intumescens Rudge; N.S. (1). C. lupuliformis Sartw. ; Ont. (1). Puccinia calthae (Grev.) Link O-I-II-III On Caltha palustris L.; Man. (1), Ont. (1). Puccinia calthaecola Schroet. O-I-II-III On Caltha palustris L.; Man. (1), Sask. (2). Puccinia campanulae Carm. Ill On Campanula rotundifolia L. var. intercedens Witasek.; Que. (17) Puccinia canadensis Arth. Ill On Viola orbiculata Geyer. ; Alta., B.C. (1). Puccinia canaliculata (Schw.) Lagerh. II-III On Cyprus strigosus L. ; Ont. (1). Puccinia caricis (Schum.) Schroet. (legitimate name, P. caracina DC.) P. caricis var. urticata (Kern) Arth. O-I On Urtica dioica L.; Ont. (1). U. gracilis Ait.; Ont. (1), Man. (2). U. lyallii Wats.; B.C. (1), Sask. (2). II-III On Carex vesicaria L.; Man., Sask. (2). Carex spp.; Man., Sask. (2). P. caricis var. grossulariata Arth. O-I On Grossularia cynosbati (L.) Mill.; Ont., Que. (1). G. hirtella (Michx.) Spack; N.S. (1). G. setosa (Lindl.) Cov. & Britt.; Alta. (1). Ribes americanum Mill.; Ont. (1), Man., Sask. (2). R. bracteosum Dougl.; B.C. (1). R. glandulosum Grauer; Alta., B.C., N.S., Labr. (1). R. grossularia L. (Grossularia uva-crispa (L.) Mill.); Man., Sask. (2). 72559—31 12 R. hudsonianum Richards.; Alta. (1). R. lacustre (Pers.) Poir.; Alta., Ont. (1). R. laxiflorum Pursh; B.C. (1). R. oxycanthoides L. (G. o. (L.) Mill.); Man., Sask. (2). R. nigrum L.; Sask. (2). R. setosum Lindl.; Sask. (2). Ribes spp.; N.B., P.E.I. (23). II-III On Carex spp.; Man., Sask. (2). P. caricis var. uniporula (Orton) Arth. O-I On Grossularia cynosbati (L.) Mill.; Ont. (1). II-III On Carex spp.; Nfld., N.S., Que., Ont. (1). Puccinia caricis-shepherdiae J. J. Davis O-I On Elaeagus angustifolia L.; Sask. (1), Man. (16). B.C. (8). E. commutata Bernh.; Alta., Man., Sask. (2). Shepherdia argentea Nutt.; Sask. (2). 5. canadensis (L.) Nutt.; Man., Sask. (2), Alta., Ont., Nfld. (1). II-III On Carex aquatilis Wahl.; Sask. (1). C. atherodes Spreng.; Sask. (2). C. eburnea Boott; Ont., Que. (1). C. lanuginosa Michx. ; Sask. (2). C. substricta (Kuekenth.) Mack.; Sask. (2). C. vesicaria L., Sask. (2). Puccinia carihami Cord a O-II-III On Carthamus tinctorius L.; Alta., Man. (14), Sask. (12). Puccinia cicutae Lasch O-I-II-III On Cicuta maculata L.; N.S., Man. (1). C. occidentalis Greene; Sask. (2). Puccinia circaeae Pers. Ill On Circaea alpinaL.; Nfld., N.S., Ont., Sask. (1), Man. (2) Que. (5). C. latifolia Mill.; N.S., Que., Ont (1). C. pacifica Asch. & Magn.; B.C. (1). Puccinia cirsii Lasch O-I-II-III On Cirsium flodmanii (Rydb.) Arth.; Man., Sask. (2). C. undulatum (Nutt.) Spreng.; Alta. (1), Man. (2). Cirsium spp.; Sask. (2). Puccinia cnici Mart. O-I-II-III On Cirsium lanceolatum (L.) Hill; B.C., Ont. (1). Puccinia cockerelliana Bethel II-III On Festuca scabrella Torr. ; Alta. (1). Puccinia comandrae Peck II-III On Comandra livida Richards.; Man. (2). C. pallida A. DC; Sask. (2). Puccinia commutata Syd. O-I-III On Valeriana septentrionalis Rydb.; Alta. (1). V. sitchensis Bong.; B.C. (1). Puccinia conglomerata (Strauss) Schmidt & Kunze III On Petasites frigidus (L.) Fries; Alta., B.C. (1). P. palmatus (Ait.) Gray; Alta., Ont., Sask. (1), Man. (2). 13 Puccinia convohuli (Pers.) Cast. O-I-II-III On Convolvulus sepium L.; Que. (1), Man. (2). Puccinia coronata Cord a O-I On Elaeagnus commutata Bernh.; Man., Sask. (25). Rhamnus alnifolia L'Her. ; Man., Sask., Ont. (1), Que. (17). R. cathartica L.; Sask., Ont. (1), Man. (2), B.C., Que., N.B., N.S., P.E.I. (23). R. davurica Pall.; Man. (22). R.frangula L.; N.B. (18). R. purshiana DC; B.C. (1). R. utilis Decne. ; Man. (22). Shepherdia canadensis (L.) Nutt. ; Alta., Yukon, Sask., Man. (D- II-III Common on oats and many cultivated and native grasses. Varieties of this rust species have been separated in Europe and North America. The varieties of this rust found in Canada are: P. coronata var. avenae Erikss. O-I On Rhamnus cathartica L. (1). II-III On Avena fatua L. (1). Avena spp., (1). Lamarkia aurea (L.) Moench (Achyrodes aureum Ktze.) (1). P. coronata var. calamagrostis Fraser & Led. O-I On Rhamnus alnifolia L'Her. (1). II-III On Calamagrostis canadensis (Michx.) Beauv. (1). C. elongata (Kearney) Rydb. (1). Scolochloa festucacea Link (1). P. coronata var. bromi Fraser & Led. O-I On Shepherdia canadensis (L.) Nutt. (1) II-III On Bromus ciliatus L. (1). B. latiglumis (Shear) Hitchc. (1). B. pumpellianus Scribn. (1). P. coronata var. elaeagni Fraser & Led. (O)-I On Elaeagnus commutata Bernh. (1). II-III On Calamagrostis montanensis Scribn. (1). (Besides the varieties reported above, var. agrostis Erikss. has been isolated from aecia on Rhamnus frangula from N.B., var. festucae Erikss. from aecia on R. cathartica from Eastern Canada, and an apparently new variety (20), sub- sequently named P. coronata f.sp. secalis by B. Peturson (Can. J. Botany 32:42 1954), from aecia on R. cathartica from Man. and Eastern Canada; II-III on Agropyron repens (L.) Beauv.; capable of attacking other wild grasses and cultivated varieties of Hordeum vulgare and Secale cereale). Puccinia crandallii Pamm. & Hume O-I On Symphoricarpos albus (L.) Blake; B.C. (1). 6". occidentalis Hook.; Sask. (1), Man. (2). Symphoricarpos spp.; Alta. (23). II-III On Festuca ovina L.; Sask. (2). F. saximontana Rydb.; Sask. (1). 14 Puccinia crucijerarum Rud. Ill On Cardamine bellidifolia L.; B.C. (1). Puccinia cryptotaeniae Peck O-III On Cryptotaenia canadensis (L.) DC; Que. (1). Puccinia cyani (Schleich.) Pass. O-I-III On Centaurea cyanus L.; Ont. (1), B.C. (16), N.S. (23). Puccinia cypripedii Arth. & Holw. II On Cypripedium parviflorum Salisb.; Sask. (1). Puccinia dayi G. W. Clint. Ill On Steironema ciliatum (L.) Raf. ; Ont., Alta., Sask. (1). Puccinia difformis Kunze O-I-III On Galium aparine L.; B.C. (1). Puccinia distichlidis Ell. & Ev. O-I On Glaux maritima L.; Sask. (25). Steironema ciliatum (L.) Raf.; Man., Sask. (25). II-III On Spartina gracilis Trin.; Sask., Man. (25). S. pectinata Link (5. michauxiana Hitchc); Man. (1), Sask., , (25). Spartina sp. ; Sask. (25). Puccinia douglasii E. & E. O-I-III On Phlox hoodii Richards.; Alta., Sask. (1). Puccinia drabae Rud. Ill On Draba arabisans Michx.; Que. (1). D. incerta Payson; Alta. (1). Draba sp.; Man. (2). Puccinia eatoniae Arth. P. eatoniae var. ranunculi Mains O-I On Ranunculus abortivus L.; Ont. (1), Man. (2). II-III On Sphenopholis obtusata (Michx.) Scribn.; Sask. (1). .S. pallens (Spreng.) Scribn.; Sask. (1). Puccinia eleocharidis Arth. O-I On Eupatorium perfoliatum L.; N.S., Ont. (1). E. purpureum L.; N.S., Ont. (1). E. purpureum var. maculatum (L.) Dark; Man. (2). II-III On Eleocharis palustris (L.) R. & S. ; Ont., Que. (1). Eleocharis spp.; Man. (2). Puccinia ellisiana Thuem. O-I On Viola nephrophylla Greene. ; Sask. (25). Viola sp.; Man., Sask. (25). II-III On Andropogon provincialis Lam.; Sask. (25), Man. (6). Schizachyrium scoparium (Michx.) Nash; Sask. (25). Puccinia emaculata Schw. II-III On Panicum capillar e L.; Ont. (1). Puccinia epilobii DC. Ill On Epilobium alpinum L.; Que. (1). Epilobium sp.; Sask. (25). Puccinia erigeniae (Orton) Arth. O-I-III On Erigenia bulbosa (Michx.) Nutt.; Ont. (1). 15 Puccinia extensicola Plowr. (legitimate name, P. dioicae P. Magn.) P. extensicola var. asteris Arth. I On Aster spp.; Man., Sask. (2). II-III On Carex spp.; Man., Sask. (2). P. extensicola var. erigerontis Arth. II-III On Carex spp.; B.C. and east of the Rocky Mts. (1). P. extensicola var. solidaginis Arth. I On Solidago nemoralis Ait.; Man. (2). S. rigida L.; Man. (2). S. serotina Ait.; Sask., Man. (2). II-III On Carex spp.; Man., Sask. (2). P. extensicola var. euthamii Arth. I On Euthamia graminifolia (L.) Nutt. (Solidago g. (L.) Salisb.); Ont. (1). II-III On Carex scoparia Schk.; N.S., Ont., Que. (1). P. extensicola var. oenotherae Arth. I On Chamaenerion spicatum (Lam.) S. F. Gray; Sask., Man. (1). Oenothera biennis L.; Man., Sask. (2). II-III On Carex sartwelli Dewey; Man. (2). P. extensicola var. hieraciata Arth. I On Senecio columbianus Greene; Sask. (1). S. flavulus Greene; Alta. (1). Hieracium scabriusculum Schw. ; Man., Sask. (2). Lactuca pulchella (Pursh) DC.; Man., Sask. (2). L. sativa L.; Man., Sask. (2), Alta., Ont., Que., N.B., N.S. (23). Lygodesmia juncea (Pursh) D. Don; Sask. (2). Nabalus albus (L.) Hook.; Man. (2). Agoseris glanca (Nutt.) Greene; Sask. (2). II-III On Carex sprengelii Dewey; Sask. (2). Carex spp.; Man., Sask. (2). P. extensicola var. phrymae Arth. II-III On Carex sprengelii Dewey; Ont. (1). Puccinia fergussoni Berk. & Br. Ill On Viola langsdorfii Fisch.; B.C. (1). V. mackloskeyi Lloyd; B.C. (1). V. nephrophylla Greene; B.C. (1). Puccinia festucae (DC.) Plowr. O-I On Lonicera caerulea L.; N.B. (1). Puccinia fischeri Cruchet & Mayor III On Saxifraga oppositifolia L.; Yukon (34). Puccinia fraseri Arth. Ill On Hieracium scabrum Michx. ; N.S., Que. (1). Puccinia gentianae (Str.) Link O-I-II-III On Gentiana affinis Griesb.; Sask. (1). G. andrewsii Griesb.; Ont. (1). G. interrupta Greene; Sask. (1). 16 Puccinia gigantea Karst. Ill On Cliamaenerion spicatum (Lam.) S. F. Gray; Alta., Man. (1). Puccinia gigantispora Bubak O-I-III On Anemone cylindrica Gray; Alta., B.C., Sask. (1). A. globosa Nutt.; Alta., B.C. (1). Puccinia glumarum (Schmidt.) Erikss. & Henn. II-III Common on graminaceous hosts in southwestern Sask., in Alta. and B.C. Puccinia graminis Pers. O-I On Berberis vulgaris L. ; wherever this host occurs. B. aquifolium Pursh, {Mahonia a. (Pursh) Nutt.); Sask. (2). Berberis spp. ; Que. (16), Ont. (6). Mahonia sp.; Ont. (6). II-III Common on graminaceous hosts. The following varieties of this rust occur in Canada: — P. graminis var. avenae Erikss. & Henn. II-III On Avena spp.; common. P. graminis var. poae Erikss. & Henn. II-III On Poa spp.; Man. (6). P. graminis var. phlei-pratensis (Erikss. & Henn.) Stakm. & Piem. II-III On Phleum pratense L.; common. Brachypodium pinnatum Beauv. ; Man. (16). P. graminis var. secalis Erikss. & Henn. II-III On Secale cereale L.; common. Hordeum vulgare L. ; fairly common. P. graminis var. tritici Erikss. & Henn. II-III On Triticum spp. ; common. Agropyron spp.; common. Hordeum jubatum L.; common. Hordeum vulgare L.; common. (To the varieties mentioned above may be added P. graminis var. agrostidis Erikss., which T. Johnson and G. J. Green (Can. J. Botany 29: 1-9. 1951) found to be the second most common variety isolated from aecia on naturally infected barberry in eastern Canada). Puccinia granulispora Ell. & Gall. O-I-II-III On Allium cernuum Roth; Alta, B.C. (1). Allium sp. ; B.C. (1). Puccinia grindeliae Peck III On Grindelia perennis A. Nels.; Alta., Sask. (2). G. squarrosa (Pursh) Dunal.; Alta., Sask. (25). Lygodesmia juncea (Pursh) D. Don.; Man. (25). Sideranthus spinulosus (Pursh) Sweet; Sask. (25). Puccinia grumosa Syd. & Holw. O-I-II-III On Zygadenus elegans Pursh; B.C. (1). Puccinia haleniae Arth. & Holw. Ill On Gentiana amarella L. var. acuta (Michx.) Herder; Ont. (2). 17 Puccinia helianthi Schw. O-I-II-III On Helianthus annuus L.; cult, common. H. aridus Rydb.; Sask. (2). H. fascicular is Greene; Man. (1), Sask. (2), Alta. (14). H. giganteus L.; Ont. (1), Sask. (25). H. maximiliani Schrad.; Man. (25). H. rigidus (Cass.) Desf. ; Ont. (1). H. strumosus L.; Ont. (1). H. subrhomboideus Rydb.; Sask. (25). H. subtuberosus Bourg. ; Alta. (2). H. tuberosus L.; Ont. (1), Man. (2), N.S. (23). Puccinia heucherae (Schw.) Diet. P. heucherae var. austroberingiana Savile III On Mitella breweri Gray; B.C. (1, 34). M. trifida Graham; B.C. (34). Saxifraga punctata sspp. ; B.C., Yukon, Keew. (34). Tellima grandiflora (Pursh) Dougl.; B.C. (1, 34). P. heucherae var. heucherae III On Heuchera cylindrica Dougl. var. glabella (T. & G.) Wheelock; B.C. (34). H. glabra Willd.; B.C. (1, 34). H. micrantha Dougl. ex. Lindl. vars. ; B.C. (34). H. ovalifolia Nutt.; Alta. (1), B.C. (34). Mitella diphylla L.; Ont. (1). M. nuda L.; Alta., Sask., Ont. (1), Man. (2), B.C., Mack., Que., Nfld. (34). M. ovalis Greene; B.C. (34). Saxifraga lyallii Engler (Micranthes I. (Engler) Small) ; B.C. (34), Alta. (1, 34). Tiarella cordifolia L.; Ont. (1, 34), Que. (1). T. unifoliata Hook.; B.C. (1, 34). Tolmiea menziesii (Pursh) T. & G. ; B.C. (34). P. heucherae var. saxifragae (Schlecht.) Savile III On Heuchera cylindrica Dougl. var. trionalis R.B. & L.; B.C., Alta. (34). H. ovalifolia Nutt.; B.C. (34). H. richardsonii R.Br.; Man. (1, 34). Saxifraga cernua L.; Mack., Frank., Keew., Que. (34). 5. hieracifolia Waldst. & Kit.; Frank., Keew. (34). S. nivalis L.; Frank., Keew. (34). S. occidentalis S. Wats. ssp. rufidula (Small) Basigalupi; B.C. (34). 5. rivularis L.; B.C. (1, 34), Frank., Que., Labr. (34). S. tenuis (Wallr.) Sm.; Frank. (34). 6*. virginiensis Michx. ; Que. (34). Puccinia hieracii (Schum.) Mart. O-I-II-III On Agoseris glauca (Nutt.) Greene; Sask. (2). Apargia autumnalis (L.) Hoffm. ; N.S. (1). Cichorium intybus L.; Ont., Que., N.S. (1). Crepis runcinata (James) T. & G.; Sask. (2). 72559—4 18 Hieracium canadense Michx.; Alta., Ont., Que. (1), Man. (2). H. scabriuscuhim Schw.; Sask., Man. (2). H. scabrum Michx.; Man. (2), N.S. (1). Taraxacum dumetorum Greene; Sask. (2). T. kok-saghyz Rod.; Alta., Man., Ont., N.S. (14). T. vulgare (Lam.) Schr. ; B.C., Alta., Sask., Ont., Que., N.S. (1), Man. (2). Puccinia holboellii (Hornem.) Rostr. O-III On Arabis divaricarpa Nels.; Alta. (1). A. drummondii A. Gray; B.C. (1). A. lignipes A. Nels.; Alta. (1). A. lyallii Wats.; B.C. (1). Puccinia hordei Otth II-III Common (23). On cultivated barley in most provinces, parti- cularly Ont. and Que. Puccinia intermixta Peck O-I-III On Iva axillaris Pursh; Sask., Man. (2). Puccinia investita Schw. O-I-III On Gnaphalium macounii Greene; Ont. (1). Puccinia iridis (DC.) Wallr. II-III On Iris versicolor L.; N.S., Ont., Que. (1), Man. (2). Iris sp.; N.B., P.E.I. (4), Que. (15). Puccinia karelica Tranz. I On Trientalis americana Pursh; N.S. (1). II-III On Carex paupercula Michx.; N.S. (1). Puccinia koeleriae Arth. O-I On Mahonia aquifolium (Pursh) Nutt.; B.C. (1). M. repens (Lindl.) Don.; B.C. (1). II-III On Koeleria cristata (L.) Pers.;Sask. (25). Puccinia lapsanae (Cooke) Fckl. O-I-II-III On Lap sana communis L.; Ont. (1). Puccinia liatridis (Webber) Bethel O-I On Liatris aspera (Michx.) Greene; Man., Sask. (2). L. ligulistylis (A. Nels.) Rydb.; Sask. (2). L. punctata Hook.; Sask. (2). II-III On Agrostis hyemalis (Walt.) B.S.P.; Man., Sask. (2). Puccinia ligustici Ell. & Ev. Ill On Ligusticum apiifolium (Nutt.) Gray; B.C. (1). Puccinia limosae Magn. O-I On Naumburgia thyrsiflora (L.) Duby; Ont., Man. (1). II-III On Carex limosa L. ; Ont. (1). C. stratiformis Britt. ; Que. (1). Puccinia linkii Klotzsch III On Viburnum pauciflorum Pylaie; Man., Sask., Que. (1). Puccinia lobeliae Ger. Ill On Lobelia syphilitica]^.] Ont. (1). Puccinia maculosa Schw. Ill On Agoseris glauca (Nutt.) Greene; Alta, (1). Nabalus racemosus (Michx.) DC; Que. (1). 19 Puccinia magnusiana Koern. O-I On Anemone canadensis L.; Sask. (1), Man. (2). II-III On Phragmites communis Trin.; Man. (2). Puccinia malvacearum Bert. Ill On Althaea ficifolia (L.) Cav. ; Ont. (1). A. rosea (L.) Cav.; common. Malva moschata L.; Ont. (1). M. rotundifolia L.; Ont. (1), Man. (2), Que. (6). Malva spp.; Man., Que., Ont. (23). Puccinia mariae-wilsoni G. W. Clint. O-I-III On Claytonia caroliniana Michx.; Ont. (1). C. virginica L.; Ont., Que. (1). Puccinia marylandica Lindr. O-I-II-II On Sanicula marilandica L.; Alta., Sask., Man. (1). Sanicula sp.; N.S. (1). Pucinia mcclatchieana Diet. & Holw. II-III On Scirpus microcarpus Presl; B.C., N.S. (1). Puccinia menthae Pers. O-I-II-III On Clinopodium vulgare L.; Ont. (1). Mentha arvensis L.; N.S. (1). M. canadensis L.; N.S., Que., Ont., Sask., Alta. (6), B.C. (5). M. glabrior (Hook.) Rydb.; Man., Sask. (2). M. piperta L.; Man. (15). M. spicata L.; Ont. (1), B.C. (22). Monarda didyma L.; Ont. (1). M.fistulosa L.; Alta., Ont., Man. (1). M. menthaefolia Benth.; Alta. (1), Sask. (2). M. mollis L.; Alta., Man., Yukon (1). M. mollis var. menthaefolia Fern.; B.C. (6). Pycnanthemum flexuosum (Walt.) B.S.P. ; Ont. (1). P. virginianum (L.) Dur. & Jacks.; Ont. (1). Puccinia mesomajalis Berk. & Curt. Ill On Clintonia borealis (Ait.) Raf.; N.S. (1), Ont. (2). C. uniflora (Schult.) Kunth; B.C. (1). Puccinia microica Ellis II-III On Cryptotaenia canadensis (L.) DC; Que. (1). Puccinia millefolii Fuckel III On Achillea millefolium L.; Man., Sask. (2), Que. (20). A. multiflora Hook.; Alta. (1). A. ptarmica L.; Que. (17, 20). Artemisia frigida Willd.; Man. (2), B.C. (1). Puccinia minussensis Thuem. O-I-II-III On Lactuca pulchella (Pursh) DC; Man., Sask., Alta., B.C. (1), Puccinia minutissima Arth. O-I On Decodon verticillatus (L.) Ell.; Ont. (1). II-III On Carex lasiocarpa Ehrh.; Ont. (1). C. substricta (Kuek.) Mack.; Ont. (1). 72559—41 20 Paccinia monoica (Peck) Arth. O-I On Arabis brachycarpa (T. & G.) Britt.; Alta. (1), Sask. (2). A. drummondii Gray; Alta. (1). A. lyrata L.; Ont. (1). A. nuttallii B. L. Rob.; B.C. (1). A. ovata (Pursh) Poir. ; Sask. (2). A. retrofracta Grah.; B.C. (1), Sask. (2). Arabis spp.; Man. (2). II-III On Koeleria cristata (L.) Pers. ; Sask. (2). Trisetum spicatum (L.) Richt.; Sask. (2). Puccinia montanensis Ellis II-III On Agropyron trachycaulum (Link) Make var. unilaterale (Cassidy) Malte; Man. (16). Agropyron spp.; Alta., Sask., Man. (1). Elymus canadensis L.; Alta., Man. (1). E. curvatus Piper; Man. (1). E. dahuricus Turcz.; Man. (14). Puccinia obscura Schroet. II-III On Lnzula campestris (L.) DC. var. multiflora (Ehrh.) Celak. ; N.S. (1), Sask. (2). L. carolinae Wats.; N.S., Ont. (1). L. parviflora (Ehrh.) Devs.; B.C. (1) Puccinia obtecta Peck II-III On Scirpus validus Vahl.; Ont., Sask. (1). Puccinia obtegens (Link) Tul. O-I-II-III On Cirsium arvense (L.) Scop.; N.S., Ont., Que. (1), P.E.I., Sask. (24). Collected at Comox, B.C., May, 1949. A. M. Brown. A perennial rust cultured in garden at Winnipeg from 1940 to 1945. Originating from urediospores brought from England by the late Dr. A. H. R. Buller. Rust was lost due to road construction 1946. A.M.B. Puccinia oenotherae Vize O-I-II-III On Epilobium minutum Lindl.; B.C. (1). Puccinia onopordi Syd. II-III On Onopordum acanthium L.; N.S. (1). Puccinia orbicula Pk. & G. W. Clint. O-I-II-III On Nabalus altissimus (L.) Hook.; N.S. (1). N. racemosus (Michx.) DC; Sask. (2). N. trifoliolatus Cass.; Que. (1). Nabalus sp.; Ont. (1). Puccinia ornata Arth. & Holw. Ill On Rumex britannica L.; Sask. (1). R. occidentalis S. Wats.; Man., Sask., Alta. (2). Rumex sp.; Alta., Man. (1). Puccinia ornatula Holw. Ill On Viola canadensis L.; B.C. (1). V. glabella Nutt.; B.C. (1). V. rugulosa Greene; B.C. (1). 21 Puccinia ortonii Jacks. O-I-II-III On Dodecatheon Jeffrey i Moore; B.C. (1). D. pauciflorum (Durand) Greene; Sask. (2). Puccinia oxyriae Fuckel II-III On Oxyria digyna (L.) Hill., Alta., B.C. (1). Puccinia parkerae Diet. & Holw. Ill On Grossularia divaricata (Dougl.) Cov. & Britt. ; B.C. (1). Ribes echinatum Lindl.; B.C. (1). R. lacustre (Pers.) Poir. ; Alta. (2). Puccinia parnassiae Arth. Ill On Parnassia fimbriata Banks; Alta., B.C. (1). Puccinia pazschkei Diet. P. pazschkei var. heterisiae (Jacks.) Savile III On Saxifraga mertensiana Bong.; B.C. (34). P. pazschkei var. jueliana (Diet.) Savile III On Saxifraga aizoides L.; Frank. (34). S. ferruginea Graham (S. nootkana Moq.); B.C. (1, 34). P. pazschkei var. oppositifoliae Savile III On Saxifraga oppositifolia L.; Que. (34). P. pazschkei var. tricuspidatae Savile III On Saxifraga bronchialis L.; B.C. (34). S. tricuspidata Rottb. (Leptasea t. (Rottb.) Haw.) ; N.W.T. (1), Yukon, Mack., Frank., Keew. (34). Puccinia phragmitis (Schum.) Koern. O-I On Rheum rhaponticum L.; Man. (2). Rumex mexicanus Meisn.; Man. (1). R. occidentalis S. Wats.; Man. (2). II-III On Phragmites communis Trin.; Man. (1). Puccinia physalidis Peck III On Phy satis heterophylla Nees; Ont., Man. (1). P. virginiana Mill.; Man. (1). Puccinia pimpinellae (Strauss) Mart. O-I-II-III On Osmorrhiza claytoni (Michx.) Clarke; Ont., Que. (1). O. longistylis (Torr.) DC; Ont. (1), Man., Sask. (2). Puccinia poae-nemoralis Otth (P. poae-sudeticae (West.) Jorstad) II-III On Poa annua L.; Alta. (1). P. compressa L., B.C. (23). P. crocata Michx.; Alta. (1). P. interior Ryd.; Alta. (1). P. nemoralis L.; Alta. (1). P. palustris L.; Alta. (1), Sask. (2). P. pratensis L.; Alta., Ont., Que., Man. (1), Sask. (2), B.C., P.E.I. (23). Anthoxanthum odoratum L.; N.S. (1). P. poae-sudeticae var. airae (Lagerh.) Arth. II-III On Deschampsia caespitosa (L.) Beauv.; Alta. (1). Puccinia poarum Niels. O-I On Tussilago farfara L.; N.S. (1). 22 Puccinia podophylli Schw. O-I-III On Podophyllum peltatum L.;Ont. (1). Puccinia polygoni-amphibii Pers. P. polygoni-amphibii var. convolvuli (Alb. & Schw.) Arth. II-III On Polygonum convolvulus L.; Ont. (1), Man. (2). P. polygoni-amphibii var. persicariae (Strauss) Arth. O-I On Geranium maculatum L.; Ont. (1). II-III On Polygonum coccineum Muhl.; Ont., Que. (1). P. hartwrightii Gray; Alta., B.C., N.S., Man. (1), Sask. (2). P. hydropiperoides Michx,; Ont. (1). P. lapathifolium L.; Ont. (1). P. muhlenbergii (Meissn.) S. Wats.; Ont., Que. (1), Man., Sask., Alta. (2). P. pensylvanicum L.; Que. (1). P. persicaria. L; (4). Puccinia porphyrogenita Curt. Ill On Cornus canadensis L.; Nfld., B.C., N S., Sask. (1), Man. (2), Que. (5), P.E.I. (6). Puccinia porri (Sow.) Wint. II-III On Allium sp.; B.C. (18). Puccinia praegracilis Arth. P. praegracilis var. praegracilis I On Habenaria gracilis Wats.; B.C. (1, 29). II-III On Agrostis thurberiana Hitchc; B.C. (1). P. praegracilis var. connersii (Savile) Savile syn. P. connersii Savile I On Habenaria dilatata (Pursh) Hook.; Que. (29). II-III On D es champ sia atro purpurea (Wahl.) Scheele; Que. (29). Puccinia pulsatillae Kalchbr. Ill On Anemone parviflora Michx.; B.C., Que. (1). A. patens L. var. wolfgangiana (Bess.) Koch; Sask. (2). Pulsatilla ludoviciana (Nutt.) Heller; Alta., Sask. (1). Trautvetteria grandis Nutt.; B.C. (1). Puccinia punctata Link O-I-II-III On Galium asprellum Michx.; N.S., Ont. (1). G. trifidum L.; Man. (2). P. punctata var. troglodytes (Lindr.) Arth. II-III On Galium triflorum Michx.; Man. (2). Puccinia pygmaea Erikss. II-III On Oryzopsis asperifolia Michx. ; Ont. (1). Puccinia pyrolae Cooke III On Polygala paucifolia Willd.; Ont. (1). Puccinia ranunculi Blytt III On Ranunculus suksdorfii Gray; B.C. (1). Puccinia recedens Syd. Ill On Senecio willingii Greenm.; Alta. (1). Puccinia ribis DC. Ill On Ribes triste Pall.; Man., Sask. (2). 23 Puccinia rubefaciens Johans. Ill On Galium boreale L.; Alta. (1), Man., Sask. (2). Puccinia rubigo-vera (DC.) Wint. P. rubigo-vera var. agropyri (Erikss.) Arth. O-I On Thalictrum spp. ; common: II-III On Poaceae common. P. rubigo-vera var. agropyrina (Erikss.) Arth. O-I On Thalictrum spp. ; common. II-III On Poaceae common P. rubigo-vera var. tritici (Erikss. & Henn.) Carl. O-I On Thalictrum dipterocarpum Franch. and T. glaucum Desf. ; in greenhouse at Winnipeg. A.M.B. II-III On Triticum spp. ; common. Secale cereale L. Rosen rye in greenhouse at Winnipeg. A.M.B. P. rubigo-vera var. secalis (Erikss.) Carl. II-III On Secale cereale L.; common. P. rubigo-vera var. apocrypta (Ell. & Tracy) Arth. O-I On Phacelia heterophylla Pursh; B.C. (1). P. rubigo-vera var. impatientis (Arth.) Mains O-I On Impatiens biflora Walt.; Man., Ont., Que. (1). I. pallida Nutt.; Ont. (1). II-III On Agrostis perennans (Walt.) Tuck., N.S. (1). Elymus virginicus L.; Ont., Que. (1). Hordeum jubatum L.; Man. (1). Puccinia rydbergii Garrett III On Sedum stenopetalum Pursh; B.C. (1). Puccinia scaber (Ell. & Ev.) Barth. II-III On Stipa viridula Trim; Alta. (1), Man., Sask. (2). Puccinia scandica Johans. Ill On Epilobium sp.; B.C. (1). Puccinia schedonnardi Kell. & Swingle II-III On Muhlenbergia cuspidata (Torr.) Rydb.; Man. (14). Puccinia septentrionalis Juel II-III On Bistorta vivipara (L.) S. F. Gray; Nfld. (1). Puccinia sessilis Schneid. O-I On Convallaria sp.; N.S. (9). Maianthemum canadense Desf.; Man. (2). Smilacina stellata (L.) Desf.; B.C., Ont. (1), Man., Sask. (2). Iris versicolor L.; Que., Man. (1). II-III On Phalaris arundinacea L.; Ont., Man. (1), Sask. (2). Puccinia seymouriana Arth. O-I On Cephalanthus occidentalis L.; Que. (1). II-III On Spartina pectinata Link (S. michauxiana Hitchc.) ; Ont., Que. (i). Pucciana sherardiana Koern. O-III On Sphaeralcea coccinea (Nutt.) Rydb.; Alta., Sask., Man. (2). 24 Puccinia sorghi Schw. II-III On Zea mays L.; Man., Sask. (2), P.E.I. (16), N.S., Ont., Que., N.B. (23). Puccinia sparganioides Ellis & Barth. O-I On Fraxinus americanus L., Que. (4), N.S. (19). Fraxinus pennsylvanica Marsh, var. lanceolata (Borkh.) Sarg. ; Que. (16), Man. (15). II-III On Spartina pectinata (Link; Que. (18). Puccinia sporoboli Arth. O-I On Liliuni umbellatum Pursh; Sask. (2). Lilium sp.; Man. (10). Puccinia stipae Arth. O-I On Chrysopsis hirsutissima Greene; Sask. (2). Solidago glaberrima Mart.; Alta. (1). 5. mollis Bartl.; Alta. (1). Solidago sp. ; Sask. (2). Lygodesmia juncea (Pursh) D. Don; Sask., Man. (2). II-III On Stipa comata Trin. & Rupr.; Alta., Man. (1), Sask. (2). S. spartea Trin.; Man., Sask. (2). 5. tweedyi Scribn. & Vasey. ; Alta. (1). Puccinia subcircinata Ell. & Ev. O-I-III On Senecio triangularis Hook.; Alta. (1). Puccinia symphoricarpi Harkn. Ill On Symphoricarpos albus (L.) Blake; B.C. (1). Puccinia treleasiana Paz. Ill On Caltha leptosepala DC; B.C. (1). Puccinia uliginosa Juel I On Parnassia palustris L.; Man. (2). Puccinia vagans (DC.) Arth. P. vagans var. epilobii-tetragoni DC. O-I-II-III On Epilobium adenocaulon Haussk.; Sask. (2). Puccinia variabilis Grev. O-II-III On Taraxacum vulgare (Lam.) Schr. ; N.S. (1). Puccinia veratri (DC.) Duby. O-I On Chamaenerion latifolium (L.) Sweet; B.C. (1). Epilobium hornemannii Reichenb. ; B.C. (1). II-III On Veratum californicum Durand; B.C. (1). V. eschscholtzianum (R. & S.) Rydb.; B.C. (1). Puccinia vexans Farl. II-III On Bouteloua gracilis (H.B.K.) Lag.; Man. (2). Puccinia vincae (DC.) Berk. O-I-II-III On Vinca major L.; Ont. (1). Puccinia violae (Schum.) DC. O-I-II-III On Viola adunca J. E. Sm.; Man. (2). V. canadensis L.; Alta., B.C. (1), Man., Sask. (2), Que. (5).. V. conspersa Riechenb.; Que. (1). V. eriocarpa Schw.; Ont. (1). V. nephrophylla Greene; Alta. (1), Sask. (2), Que. (4). V. odorata L.; Man. (2), B.C. (21). 25 V. pedatifida G. Don.; Man., Sask. (2). V. pubescens Ait.; Ont. (3). V. renifolia Gray; Sask. (2). V. septentrionalis Greene; N.S., Ont. (1). V. sororia Willd.; Ont. (1). V. tricolor L.; Man. (2), B.C. (23). Viola spp., B.C.; Sask., Man., N.B., N.S. (2). Puccinia virgaureae (DC.) Lib. Ill On Solidago puberula Nutt. ; N.S. (1). Puccinia waldsteiniae Curt. Ill On Waldsteinia fragarioides (Michx.) Tratt. ; Ont. (1). Puccinia winds oriae Schw. II-III On Triodiaflava (L.) Smyth; Ont. (1). Puccinia xanthii Schw. Ill On Ambrosia coronopifolia T. & G.; Man. (2). A. trifida L.; Ont. (1), Man. (2). Xanthium commune Britt. ; Man. (2). X. chinense Mill.; Ont. (1). Puccinia ziziae E. & E. Ill On Zizia cor data (Walt.) Koch; Sask. (2). Pucciniastrum agrimoniae (Schw.) Tranz. II-III On Agrimonia gryposepala Wallr.; N.S. (1), Alta., Man. (25), Que. (4). A. pubescens Wallr.; Ont. (1). A. striata Michx.; Alta. (1). Agrimonia sp. ; N.S. (31). Pucciniastrum americanum (Farl.) Arth. O-I On Picea glauca (Moench) Voss (P. canadensis (Mill.) B.S.P.); Ont. (1). II-III On Rubus melanolasius Focke; B.C. (1). R. strigosus Michx.; N.S., Ont., Que. (1). Rubus spp.; P.E.I. (4), Que. (5), N.B. (23). Pucciniastrum arcticum (Lagerh.) Tranz. O-I On Picea glauca (Moench) Voss (P. canadensis (Mill.) B.S.P.); Alta., Ont. (1). II-III On Rubus acaulis Michx.; Sask. (2). R. arcticus L. ; Man. (2). R. pubescens Raf. ; Man. (25). R. iriflorus Richards.; Alta., Man., N.B., Ont. (1), Sask. (2). Rubus spp.; Ont., P.E.I. (23). Pucciniastrum galii (Link) E. Fisch. II-III On Galium triflorum Michx.; B.C. (1). Pucciniastrum goeppertianum (Kuehn) Kleb. O-I On Abies balsamea (L.) Mill.; N.S., Que., Sask. (1). A. lasiocarpa (Hook.) Nutt.; Alta., B.C. (1). Ill On Vaccinium myrtillus L.; Alta. (1). V. oreophilum Rydb.; Alta. (1). V. pennsylvanicum Lam.; N.S., Nfld. (1). V. vitis-idaea L.; Sask. (2). Vaccinium spp.; Ont., Man. (2), Que., N.B., N.S. (23). 26 Pucciniastrum myrtilli (Schum.) Arth. 0-1 On Tsuga canadensis (L.) Carr. ; N.S. (1). II-III On Rhodora canadensis (L.) Torr. ; N.S. (1). Gaylussacia baccata (Wang.) K. Koch; Que. (1). Vaccinium corymbosum L., Ont. (1). V. myrtillus L.; Alta. (1). V. pennsylvanicum Lam.; N.S. (1). Pucciniastrum potent Mae Kom. II-III On Potentilla tridentata Ait. (Sibbaldiopsis t. (Ait.) Rydb.); Man. (2), N.B., Ont. (1). Pucciniastrum pustulatum (Pers.) Diet. O-I On Abies amabilis (Loud.) Forbes; B.C. (1). A. balsamea (L.) Mill.; Alta., N.S. (1), Ont. (24). A. lasiocarpa (Hook.) Nutt.; B.C. (1). II-III On Chamaenerion spicatum (Lam.) S. F. Gray; Alta., B.C., Man., N.S., N.W.T., Sask., Nfld. (1). Clarkia spp.; Sask., P.E.I. (23). Epilobium adenocaulon Haussk.; Ont. (24), Man., Sask. (2), B.C.(l). Epilobium spp.; Ont. (1), Que. (5). Godetia spp.; Alta., Sask., Man., Ont., Que., P.E.I. (23). Pucciniastrum pyrolae (Pers.) Schroet. II-III On Moneses uniflora (L.) Gray; Alta. (1). Pyrola asarifolia Michx.; Alta., Man. (1), Sask. (2). P. chlorantha Sw.; Alta. (1), Man. (25). P. elliptica Nutt.; Alta., N.S., Ont., Sask. (1). P. rotundifolia Michx.; Man. (2). P. secunda L.; Alta., Ont. (1). Pucciniastrum sparsum (Wint.) E. Fisch. II-III On Arctostaphylos alpina (L.) Spreng. ; B.C. (1), Man. (2). Arbutus menziesii Pursh; B.C. (6). Tranzschelia fusca (Pers.) Diet. O-III On Anemone quinquefolia L.; Ont. (1). Tranzschelia pruni-spinosae (Pers.) Diet. O-I On Anemone coronaria L.; B.C. (19). A. quinquefolia L.; Ont., Que. (1). Hepatica acutiloba DC; Que. (1). Ranunculus recurvatus Poir. ; B.C. (1). II-III On Padus nana (DuRoi) Roem., Ont. (1). Prunus domestica L.; B.C. (23). Tranzschelia suffusca (Holw.) Arth. O-III On Anemone patens L., var. wolfgangiana (Besser) Koch; Man., Sask. (2). Pulsatilla ludoviciana (Nutt.) Heller; Sask. (1). Tranzschelia thalictri (Chev.) Diet. O-III On Thalictrum dasycarpum Fisch. & Lall.; Man. (2). T. polygamum Muhl.; N.S., Ont. (1). T. venulosum Trel.; Sask. (2). Thalictrum sp.; Que. (Collected by A. Payette, July 1949.) 27 Uraecium holwayi Arth. 0-1 On Tsuga heterophylla (Raf.) Sarg. ; B.C. (1). T. mertensiana (Bong.) Carr. ; B.C. (1). Uredinopsis macros per ma (Cooke) Magn. O-I On Abies sp.; B.C. (12). II-III On Pteridium aquilinum (L.) Kuehn var. pubescens Underw. ; B.C. (D- Uredinopsis mirabilis (Peck) Magn. O-I On Abies balsamea (L.) Mill.; N.S., NfiU, Ont. (1) II-III On Onoclea sensibilis L.; N.S., Ont., Que. (1). Uredinopsis osmundae Magn. O-I On Abies balsamea (L.) Mill.; N.S. (1), Ont. (24). II-III On Osmunda claytoniana L.; N.S. (1), Ont. (24). 0. spectabilis Willd.; N.S. (1). Uredinopsis phegopteridis Arth. O-I On Abies balsamea (L.) Mill.; N.S. (1), Ont. (24). II-III On Phegopteris dryopteris (L.) Fee; Alta., N.S. (1), Ont. (24). Uredinopsis struthiopteridis Stoermer O-I On Abies balsamea (L.) Mill.; N.S. (1), Man., Sask. (2)," Ont. (24). II-III On Athyrium cyclosorum Rupr., N.S., Ont. (1) Filix bulbifera (L.) Underw., Ont. (1). Pteretis nodulosa (Michx.) Nieuwl.; Alta., N.S., Que., Nfld. (1), Man. (2). Dryopteris thelypteris (L.) Gray; N.S., Ont. (1). Uromyces abbreviatus Arth. O-III On Psoralea physodes Dougl.; B.C. (1). Uromyces acuminatus Arth. II-III On Spartina alterniflora Loisel., N.S. (1). 5. gracilis Trin.; Alta. (1), Sask. (2). S. pectinata Link (S. michauxiana Hitchc); Man., N.S. (1), Sask. (25). U. acuminatus var. magnatus (Arth.) J. J. Davis O-I On Maianthemum canadense Desf. ; N.S. (1), Sask. (2). Smilacina stellata (L.) Desf.; Sask. (2). U. acuminatus var. polemonii J. J. Davis O-I On Collomia linearis Nutt., Sask. (2). Phlox sp., Sask. (25). U. acuminatus var, spartinae (Farl.) Arth. O-I On Moehringia lateriflora (L.) Fenzl; N.S. (1). Spergularia canadensis (Pers.) D. Don; N.S. (1). U. acuminatus var. steironematis (Arth.) J. J. Davis O-I On Dodecatheon pauciflorum (Durand) Greene; Sask. (1). Uromyces alopecuri Seym. O-I On Ranunculus macounii Britt. ; Man. (25), Sask. (2). R. micranthus Nutt.; Alta. (1). R. scleratus L. ; Man. (25). II-III On Alopecurus aristulatus Michx.; Man., Sask. (25). A. geniculatus L. var. aristulatus Torr. ; Man. (2). 28 Uromyces amoenus Syd. Ill On Anaphalis subalpina (Gray) Rydb.; B.C. (1). Uromyces armeriae (Schlecht.) Lev. U. armeriae ssp. hudsonicus Savile & Conners O-I-II-III On Armeria maritima Willd. var. labradorica Wallr.,; Que. (30). U. armeriae ssp. pacificus Savile & Conners I-II-III On A rmeria maritima Willd.; B.C. (30). Uromyces asclepiadis (Schw.) Cooke II-III On Asclepias incarnata L.; Ont. (1). A. syriaca L.; Ont. (1). Uromyces betae (Pers.) Lev. II-III On Beta vulgaris L.; B.C. (12). Uromyces caladii (Schw.) Farl. O-I-II-III On Arisaema triphyllum (L.) Schott; N.S., Ont., Que. (1). Muricauda dracontium (L.) Small; Ont. (1). Uromyces caryophyllinus (Schr.) Wint. II-III On Dianthus caryophyllus L.; Man. (2), Sask. (25), all provinces (23). Uromyces color adensis Ell. & Ev. U. color adensis var. campester Arth. O-I-III On Vicia americana Muhl., Alta. (1), Man. (2). V. cracca L.; Man. (2). V. oregana Nutt. ; Ont. (1). V. sparsifolia Nutt.; Sask. (2). U. color adensis var. maritimus Arth. O-I-III On Vicia americana Muhl.; B.C. (1). Uromyces dactylidis Otth O-I On Ranunculus repens L.; N.S. (1). II-III On Dactylis glomerata L.; N.S. (23). Poa crocata Michx.; Alta. (1). P. pratensis L.; Alta. (1). P. trivialis L.; N.S. (1). Uromyces fabae (Pers.) de Bary O-I-II-III On Lathyrus myrtifolius Muhl; Ont. (1). L. ochroleucus Hook.; Alta., Ont. (1), Man., Sask. (25). L. venosus Muhl.; Alta. (1), Sask. (25), Man. (2). Pisum sativum L. ; Man., Sask. (25), B.C., P.E.I., Que. (12), Ont., Que., N.B., N.S. (23). Vicia americana Muhl.; Man., Alta. (25), B.C. (1). V. angustifolia Reichard; B.C. (1). V. cracca L.; N.S., Que. (1). V. oregana Nutt.; Alta. (25). V. sativa L.; B.C., Alta. (23). V. sparsifolia Nutt.; Alta. (1). Uromyces gentianae Arth. II-III On Gentiana strictiflora (Rydb.) Nels. ; Sask. (2). Pleurogyne rotata (L.) Griesb.; Que. (1). Uromyces geranii (DC.) Fries O-I-II-III On Geranium spp.; P.E.I. (12), Ont. (23). 29 Uromyces glycyrrhizae (Rab.) Magn. O-I-III On Glycyrrhiza lepidota Nutt.; Alta. (1), Man., Sask. (25). Uromyces hedysari-obscuri (DC.) Car. & Pice. O-I-II-III On Hedysararn americanum (Michx.) Britt.; Alta. (1). H. boreale Nutt.; Alta. (1), Man., Sask. (2). H. cinerascens Rydb.; Alta. (1), Sask. (2). H. mackenzii Richards.; Alta. (1). H. sulphurascens Rydb.; Alta. (1). Uromyces hedysari-paniculati (Schw.) Farl. O-I-II-III On Desmodium dillenii Darl.; Ont. (1). Uromyces heterodermus Syd. O-III On Erythronuim grandiflorum Pursh; B.C. (1). Uromyces holwayi Lagerh. O-I-II-III On Lilium canadense L.; Ont. (1). L. columbianum Hanson; B.C. (1). L. michiganense Farwell; Ont. (1). Uromyces houstoniatus (Schw.) Sheldon O-I On Houstonia longifolia Gaertn.; Sask. (1). Uromyces hyperici (Spreng.) Curt. O-I-II-III On Hypericum kalmianum L.; Ont. (1). H. perforatum L.; Man. (2). H. prolificum L. ; Ont. (1). H. virginicum L.; (Triadenum v. (L.) Raf.); N.S., Ont., Que. (i). Uromyces intricatus Cooke O-I-III On Eriogonum flavum Nutt. ; Sask. (2). Uromyces junci (Desm.) L. Tul. O-I On Aster spp.; Sask., Ont. (1). Helianthus petiolaris Nutt.; Man., Sask. (25). H. subrhomboideus Rydb.; Sask. (2). H. subtuberosus Bourg. ; Alta. (1). H. tuber osus L.; Man. (1). Cirsium flodmanii (Rydb.) Arth.; Man. (1), Sask. (2). C. megacephalum (Gray) Cockerell; Sask. (2). C. undulatum (Nutt.) Spreng.; Alta. (1), Sask. (25). Arnica chamissonis Less.; Alta. (1). II-III On Juncus ater Rydb.; Alta. (1), Sask. (25). /. balticus Willd.; Man., Sask. (25). /. dudleyi Wieg. ; Man. (25). J. filiformis L.; Sask. (25). Uromyces junci-effusi Syd. II-III On Juncus filiformis L. ; N.S. (1). /. xiphioides E. Mey. ; B.C. (1). Uromyces lapponicus Lagerh. O-I-III On Astragalus macounii Rydb.; Alta. (1). Astragalus sp. ; Alta. (1). Phacafrigida L.; N.W.T. (1). Uromyces lespedezae-procumbentis (Schw.) Curt. O-I-II-III On Lespedeza capitata Michx.; Ont. (1). 30 Uromyces limonii (DC.) Lev. O-I-II-III On Limonium latifolium; B.C. (30). L. vulgar e\ Ont. (30). Uromyces limonii-caroliniani Savile & Conners O-I-II-III On Limonium nashii Small (not L. carolinianum (Walt.) Britt.); Que., N.B., N.S. (30). Uromyces lapini Berk. & Curt. O-I-II-III On Lupinus sp.; B.C. (13). Uromyces minor Schroet. I-III On Trifolium dubium Sibth.; B.C. (18). T. microdon H. & A. ; B.C. (1). T. oliganthum Steud.; B.C. (1). Uromyces miurae Syd. Ill On Fritillaria kamtschatcensis Ker. ; B.C. (1). Uromyces nerviphilus (Grognot) Hotson O-I-III On Trifolium hybridum L.; Sask. (2). T. pratense L.; Ont. (23). T. repens L.; Ont. (1). Man. (2). Uromyces peckianus Farl. O-I On Atriplex patula L.; N.S. (1). Chenopodium album L.; N.S. (1). Salicornia herbacea L.; N.S. (1). S. pacifica Standi.; B.C. (1). Suaeda maritima (L.) Dumort; N.S. (1). Plantago eriopoda Torr. ; Alta. (1). II-III On Distichlis spicata (L.) Greene; B.C., N.S. (1). Uromyces perigynius Halst. II-III On Rudbeckia ampla A. Nels. ; Man. (6). O-I On R. laciniata L.; Man. (1). Uromyces phaseoli (Pers.) Wint. O-I-II-III On Phaseolus vulgaris L.; Ont. (1), B.C. (13), P.E.I. (12), N.B. (19), Que., N.S. (23). Uromyces plumbarius Peck O-I-II-III On Gaura coccinea Nutt.; Alta. (1), Sask. (25), Man. (2). Uromyces polygoni (Pers.) Fckl. , O-I-II-III On Polygonum aviculare L.; Ont., Que. (1), Alta. (6), P.E.I. (4), Man. (2). P. buxiforme Small; Sask. (2). P. erectum L.; Man. (2). P.fowleri Rob.; Nfld. (1). P. ramosissimum Michx.; Man. (2). P. rubescens Small; Sask. (2). P. spergulariaeforme Meissn.; B.C. (1). Uromyces proeminens (DC.) Pass. U. proeminens var. euphorbiicola (Tranz.) Arth. O-I-II-III On Chamaesyce humistrata (Engelm.) Small; Ont. (1). 31 U. proeminens var. proeminens O-I-II-III On Chamaesyce glyptosperma (Engelm.) Small; Sask. (25). C. hirsuta (Torr.) Arth,; Ont. (1). C. serphyllifolia (Pers.) Small; B.C. (1), Man. (25). Uromyces psoraleae Peck U. psoraleae var. argophyllae (Seym.) Arth. O-I-III On Psoralea argophylla Pursh; Sask. (2). U. psoraleae var. psoraleae O-I-III On Psoralea lanceolata Pursh; Sask. (2). Uromyces punctatus Schroet. II-III On Oxytro pis gracilis (A. Nels.) K. Schum.; Man. (2). Uromyces pyriformis Cooke (See note under U. sparganii) II-III On Acorus calamus L.; Ont. (1). Uromyces rhyncosporae Ellis II-III On Rhynchospora alba (L.) Vahl; Ont. (1). Uromyces rudbeckiae Arth. & Bisby III On Rudbeckia laciniata L.; Man. (2), Ont. (1). Uromyces scirpi (Cast.) Burr. O-I On Cicuta occidentalis Greene; Sask. (2). Sium cicutaefolium Schrank; Man., Sask. (2). II-III On Scirpus fluviatilis (Torr.) Gray; Que. (1). S. paludosus Nels.; N.S. (1), Sask. (2). S. validus Vahl; N.S., Ont. (1). (According to G.B. Cummins (Mycologia 27: 611. 1935) the rust on Scirpus validus is U. americanus Speg., not U. scirpi). Uromyces silphii (Burr.) Arth. • II-III On J uncus longistylis Torr.; Man. (1), Sask. (2). /. macer S. F. Gray; Sask. (2), Ont. (1). Uromyces sparganii Cooke & Peck II-III On Sparganium eurycarpum Englem.; Ont., Que. (1). (J. A. Parmelee and D. B. O. Savile (Mycologia 46: 823-826. 1954) report that U. pyriformis on Acorus calamus is indistinguishable from U. sparganii ssp. sparganii and have demonstrated that the O-I states, which were found in Ont. and Que., occur on Hypericum virginicum. The II-III states were also reported on A. calamus in Que., N.S., and on S. eurycarpum in N.S.). Uromyces spragueae Hark. I-III On Lewisia rediviva Pursh; B.C. (5). (D. B. O. Savile and J. A. Parmelee (Mycologia 1956, in press) have placed the rust on L. rediviva in B.C. in U. unitus Peck ssp. unitus). Uromyces striatus Schroet. O-I On Euphorbia cyparissias L.; Ont. (18). II-III On Medicago lupulina L.; Ont. (1). M. sativa L.; Man. (2), Sask. (18), Ont., N.S., P.E.I. (23). 32 Uromyces trifolii (Hedw. f.) Lev. U. trifolii var. trifolii-repentis (Liro) Arth. O-I-II-III On Trifolium repens L.; Nfld., Man. (1), Alta. (2), P.E.I. (12), B.C., Sask., Ont., Que. (23). T. incarnatum L. ; P.E.I. (23). U. trifolii var. hybridi (W. H. Davis) Arth. O-I-II-III On Trifolium hybridum L.; Ont. (1), Man., Sask., Atta. (2), AU provinces (23). U. trifolii var. fallens (Desm.) Arth. O-I-II-III On Trifolium medium L.; Man. (2). T. pratense L.; Man., B.C., Ont., Que., N.S. (1), N.B., P.E.I. (23). Uromyces zygadeni Arth. O-I-II-III On Zygadenus gramineus Rydb.; Alta. (1). Uropyxis amorphae (Curt.) Schroet. II-III On Amorpha canescens Pursh.; Man. (2). A. fruticosa L.; Man. (25). A. nana Nutt.; Man. (2). Uropyxis petalostemonis (Farl.) de Toni O-I-II-III On Petalostemon oligophyllus (Torr.) Rydb.; Sask. (2). A LIST OF HOSTS AND THE RUSTS THAT MAY BE EXPECTED TO OCCUR ON THEM Abies amabilis (Loud.) Forbes Pucciniastrum pustulatum Abies balsamea (L.) Mill. Hyalopsora aspidiotus Melampsora abieti-capraearum Melampsorella cerastii Milesia fructuosa M. marginalis M. polypodophila Pucciniastrum goeppertianum P. pustulatum Uredinopsis macrosperma U. mirabilis U. osmundae U. phegopteridis U. struthiopteridis Abies grandis Lindl. Melampsorella cerastii Abies lasiocarpa (Hook.) Nutt. Melampsorella cerastii Pucciniastrum pustulatum P. goeppertianum Abies sp. Uredinopsis macrosperma Achillea millefolium L. Puccinia millefolii Achillea multiflora Hook. Puccinia millefolii Achillea ptarmica L. Pucccinia millefolii Acorus calamus L. Uromyces pyriformis Actaea alba (L.) Mill. Puccinia rubigo-vera var. agropyri Actaea brachypoda Ell. Puccinia rubigo-vera var. agropyrina Actaea rubra (Ait.) Willd. Puccinia rubigo-vera var. agropyri Adoxa moschatellina L. Puccinia argentata Adoxa sp. Puccinia adoxae Aegilops cylindrica Host, cult. Puccinia glumarum Aegilops sp., cult. Puccinia glumarum P. rubigo-vera var. tritici Agoseris glauca (Pursh) Raf. Puccinia extensicola var. hieraciata P. hieracii P. maculosa Agrimonia gryposepala Wallr. Pucciniastrum agrimoniae Agrimonia pubescens Wallr. Pucciniastrum agrimoniae Agrimonia striata Michx. Pucciniastrum agrimoniae Agrimonia sp. Pucciniastrum agrimoniae Agropyron albicans Scribn. & Sm. Puccinia montanensis P. rubigo-vera var. agropyrina Agropyron cristatum (L.) Gaertn., cult. Puccinia glumarum P. graminis Agropyron dasystachyum (Hook.) Scribn. Puccinia glumarum P. graminis P. montanensis P. rubigo-vera var. agropyri Agropyron desertorum Schult. Puccinia glumarum Agropyron elongatum Host Puccinia glumarum Agropyron grimthsii Scribn. & Sm. Puccinia glumarum P. graminis Agropyron obtusiusculum Lange Puccinia glumarum Agropyron repens (L.) Beau v. Puccinia coronata P. glumarum. P. graminis P. montanensis P. rubigo-vera var. agropyrina Agropyron richardsonii (Trin.) Schrad. Puccinia graminis P. glumarum P. montanensis P. rubigo-vera var. agropyrina Agropyron smithii Rydb. Puccinia coronata P. graminis P. glumarum P. montanensis P. rubigo-vera var. agropyri Agropyron spicatum (Pursh) Scribn. & Sm. Puccinia glumarum P. rubigo-vera var. agropyri Agropyron trachycaulum (Lk.) Malte (A. tene- rum Vasey) Puccinia coronata P. glumarum P. graminis P. montanensis P. rubigo-vera var. agropyri P. rubigo-vera var. agropyrina Agropyron violaceum (Hornem.) Lange Puccinia rubigo-vera var. agropyri Agrostis exarata Trin. Puccinia ?praegracilis 34 Agrostis hyemalis (Walt.) B.S.P. Puccinia graminis P. liatridis Agrostis palustris Huds. Puccinia graminis Agrostis perennans (Walt.) Tuckerm. Puccinia graminis P. rubigo-vera var. impatientis Agrostis stolonifera L. Puccinia graminis Agrostis tenuis Sibth. Puccinia graminis Agrostis thurberiana Hitchc. Puccinia praegracilis var. praegracilis Allium cernuum Roth Puccinia granulispora Allium textile Nels. & Macbr. Puccinia blasdalei Allium sp. Puccinia granulispora P. porri Alopecurus aristulatus Michx. Uromyces alopecuri Alopecurus geniculatus L. var. aristulatus Torr. Uromyces alopecuri Alopecurus pratensis L. Puccinia graminis P. rubigo-vera var. agropyrina Althaea ficifolia (L.) Cav. Puccinia malvacearum Althae rosea (L.) Cav. Puccinia malvacearum Ambrosia psilostachya DC. (A. coronopifolia T. & G.) Puccinia xanthii Ambrosia trifida L. Puccinia xanthii Amelanchier alnifolia Nutt. Gymnosporangium clavariaeforme G. clavipes G. corniculans G. juvenescens G. nelsoni Amelanchier canadensis (L.) Medic, Gymnosporangium clavariaeforme Amelanchier intermedia Spach Gymnosporangium clavipes G. nidus-avis Amelanchier florida Lindl. Gymnosporangium juvenescens Amelanchier oligocarpa (Michx.) Roem. Gymnosporangium clavipes Amelanchier pumila Nutt. Gymnosporangium juvenescens Amelanchier sanguinea (Pursh) DC. Gymnosporangium corniculans G. clavipes Amelanchier spicata Gymnosporangium clavariaeforme Amelanchier spp. Gymnosporangium clavipes Amorpha canescens Pursh Uropyxis amorphae Amorpha fruticosa L. Uropyxis amorphae Amorpha nana Nutt. Uropyxis amorphae Anaphalis subalpina (Gray) Rydb. Uromyces amoenus Andropogon provincialis Lam. Puccinia andropogonis var. pustulata P. ellisiana Andropogon scoparius Michx. Puccinia andropogonis var. pustulata P. ellisiana Anemone canadensis L. Puccinia anomones-virginianae P. magnusiana Anemone coronaria L. Tranzschelia pruni-spinosae Anemone cylindrica Gray Puccinia gigantispora P. rubigo-vera var. agropyri P. rubigo-vera var. agropyrina Anemone globosa Nutt. Puccinia gigantispora P. rubigo-vera var. agropyri P. rubigo-vera var. agropyrina Anemone husdoniana Richards. Puccinia rubigo-vera var. agropyrina Anemone parviflora Michx. Puccinia pulsatillae Anemone patens L. var. wolfgangiana (Besser) Koch Puccinia pulsatillae Tranzschelia suffusca Anemone quinquefolia L. Puccinia rubigo-vera var. agropyrina Tranzschelia fusca T. pruni-spinosae Anemone riparia Fern. Puccinia anemones-virginianae P. rubigo-vera var. agropyrina Anemone virginiana L. Puccinia anemones-virginianae P. rubigo-vera var. agropyri Anthoxanthum odoratum L. Puccinia poae-nemoralis Antirrhinum majus L., cult. Puccinia antirrhini Apargia autumnalis (L.) Hoffm. Puccinia hieracii Aquilegia flavescens Wats. Puccinia rubigo-vera var. agropyri Aquilegia formosa Fisch. Puccinia rubigo-vera var. agropyri Arabis brachycarpa (Torr. & Gray) Britt. Puccinia monoica Arabis divaricarpa Nels. Puccinia holboellii Arabis drummondii Gray Puccinia holboellii P. monoica 35 Arabis lignipes Nels. Puccinia holboellii Arabis lyallii Wats. Puccinia holboellii Arabis lyrata L. Puccinia monoica Arabis nuttallii B. L. Rob. Puccinia monoica Arabis ovata (Pursch) Poir. Puccinia monoica Arabis retrofracta Grah. Puccinia monoica Arabis sp. Puccinia monoica Aralia nudicaulis L. Nyssopsora clavellosa Arbutus menziesii Pursh Pucciniastrum sparsum Arctium minus Schk. Puccinia bardanae Arctostaphylos alpina (L.) Spreng. Pucciniastrum sparsum Arctostaphylos uva-ursi (L.) Spreng. Chrysomyxa arctostaphyli Arisaema triphyllum (L.) Schott. Uromyces caladii Armeria maritima Willd., cult. Uromyces armeriae ssp. pacificus Armeria maritima Willd. var. labradorica Wallr. Uromyces armeriae ssp. hudsonicus Arnica chamissonis Less. Uromyces junci Aronia arbutifolia (L.) Ell. Gymnosporangium clavipes Aronia melanocarpa (Michx.) Ell. Gymnosporangium clavipes Artemisia biennis Willd. Puccinia atrofusca Artemisia camporum Rydb. Puccinia atrofusca Artemisia cana Pursh Puccinia absinthii Artemisia caudata Michx. Puccinia atrofusca Artemisia frigida W7illd. Puccinia absinthii P. atrofusca P. millefolii Artemisia glauca Pallas Puccinia atrofusca Artemisia gnaphalodes Nutt. Puccinia absinthii P. atrofusca Artemisia ludoviciana Nutt. Puccinia absinthii Artemisia purshiana Besser Puccinia atrofusca Asarum caudatum Lindl. Puccinia asarina Asclepias incarnata L. Uromyces asclepiadis Asclepias syriaca L. Uromyces asclepiadis Asparagus officinalis L., cult. Puccinia asparagi Aster conspicuus Lindl. Coleosporium solidaginis Aster cordifolius L. Coleosporium solidaginis Puccinia asteris Aster ericoides L. Coleosporium solidaginis Puccinia asteris Aster junceus Ait. Coleosporium solidaginis Aster laevis L. Coleosporium solidaginis Puccinia asteris Aster lateriflorus (L.) Britt. Coleosporium solidaginis Aster lindleyanus Torr. & Gray Coleosporium solidaginis Puccinia asteris Aster novae-angliae L. Coleosporium solidaginis Puccinia asteris Aster occidentalis Nutt. Coleosporium solidaginis Aster paniculatus Lam. Coleosporium solidaginis Aster salicifolius Lam. Coleosporium solidaginis Aster umbellatus Mill. Coleosporium solidaginis Aster spp. Puccinia extensicola var. asteris Uromyces junci Astragalus macounii Rydb. Uromyces lapponicus Astralagus sp. Uromyces lapponicus Athyrium cyclosorum Rupr. Uredinopsis struthiopteridis Atriplex patula L. Uromyces peckianus Avena fatua L. Puccinia coronata P. graminis Avena nuda L. Puccinia graminis Avena sativa L., cult. Puccinia coronata P. graminis Balsamorrhiza sagittata (Pursh) Nutt. Puccinia balsamorhizae Beckmannia erucaeformis (L.) Host. Puccinia coronata Beckmannia syzigachne (Steud.) Fern. Puccinia coronata P. graminis Berberis aquifolium Pursh (Mahonia a. (Pursh) Nutt.), cult. Puccinia graminis 36 Eerberis vulgaris L., cult, and escaped Puccinia graminis Berberis spp. Puccinia graminis Beta vulgaris L. Uromyces betae Betula populifolia Marsh. Melampsoridium betulinum Betula pumila L. Melampsoridium betulinum Betula sp. Melampsoridium betulinum Bistorta vivipara (L.) S. F. Gray Puccinia bistortae P. septentrionalis Bouteloua gracilis (H.B.K.) Lag. Puccinia vexans Briza maxima L. Puccinia graminis Briza minor L. Puccinia graminis Bromus carinatus Thurb. Puccinia glumarum Bromus carinatus hookerianus (Thurb.) Shear Puccinia rubigo-vera var. agropyri Bromus ciliatus L. Puccinia coronata P. glumarum P. rubigo-vera var. agropyri P. rubigo-vera var. agropyrina Bromus ciliatus laeviglumis Scribn. Puccinia rubigo-vera var. agropyrina Bromus hordeaceus L. Puccinia graminis * Bromus latiglumis (Shear) Hitchc. Puccinia coronata P. rubigo-vera var. agropyrina Bromus marginatus Nees. Puccinia glumarum Bromus porteri (Coulter) Nash Puccinia coronata P. rubigo-vera var. agropyri Bromus pumpellianus Scribn. Puccinia coronata P. graminis P. rubigo-vera var. agropyri Bromus purgans L. Puccinia rubigo-vera var. agropyrina Bromus sitchensis Trim, cult. Puccinia glumarum Bromus spp. Puccinia glumarum Calamagrostis canadensis (Michx.) Beau v. Puccinia coronata Calamagrostis elongata (Kearney) Rydb. Puccinia coronata Calamagrostis montanensis Scribn. Puccinia coronata Calamagrostis rubescens Buckl. Puccinia coronata Calamovilfa longifolia (Hook.) Hack. Puccinia amphigena Callistephus chinensis Nees, cult. Coleosporium solidaginis Caltha leptosepala DC. Puccinia areolata P. treleasiana Caltha palustris L. Puccinia calthae P. calthaecola Campanula persicifolia L. Coleosporium campanulae Campanula rapunculoides L. Coleosporium campanulae Campanula rotundifolia L., var. intercedens Witasek Puccinia campanulae Campanula spp. Coleosporium campanulae Cardamine bellidifolia L. Puccinia cruciferarum Cardamine douglasii (Torr.) Britt. Puccinia arabicola Carex aquatilis Wahl. Puccinia caricis-shepherdiae Carex atherodes Spreng. Puccinia caricis-shepherdiae Carex douglasii Boott Puccinia atrofusca Carex eburnea Boott Puccinia caricis-shepherdiae Carex eleocharis Bailey Puccinia atrofusca Carex filifolia Nutt. Puccinia atrofusca Carex intumescens Rudge Puccinia bolleyana Carex lanuginosa Michx. Puccinia caricis-shepherdiae Carex lasiocarpa Ehrh. Puccinia minutissima Carex limosa L. Puccinia limosae Carex lupuliformis Sartw. Puccinia bolleyana Carex paupercula Michx. Puccinia karelica Carex praegracilis Boott Puccinia atrofusca Carex rossii Boott Pucinia atrofusca Carex sartwellii Dewey Puccinia extensicola var. oenotherae Carex scoparia Schk. Puccinia extensicola var. euthamii Carex sprengelii Dewey Puccinia extensicola var. hieraciata P. extensicola var. phrymae Carex stratiformis Britt. Puccinia limosae Carex substricta (Kuek.) Mack. Puccinia caricis-shepherdiae P. minutissima 37 Carex vesicaria L. Puccinia caricus var, urticata P. caricis-shepherdiae Carex spp. Puccinia caricis var. grossulariata P. caricis var. uniporula P. caricis var. urticata P. extensicola var. asteris P. extensicola var. hieraciata P. extensicola var. solidaginis P. extensicola var. erigerontis Carthamus tinctorius L. Puccinia carthami Castilleja sessiliflora Pursh Puccinia andropogonis var. micropuncta Centaurea cyanus L. Puccinia cyani Cephalanthus occidentalis L. Puccinia seymouriana Cerastium alpinum L. Melampsorella cerastii Cerastium arvense L. Melampsorella cerastii Cerastium berringianum C. & S. Melampsorella cerastii Cerastium vulgatum L. Melampsorella cerastii Chamaedaphne calyculata (L.) Moench Chrysomyxa cassandrae C. ledi var. cassandrae Chamaenerion latifolium (L.) Sweet Puccinia veratri Chamaenerion spicatum (Lam.) S. F. Gray Pucciniastrum pustulatum Puccinia extensicola var. oenotherae P. gigantea Chamaesyce glyptosperma (Engelm.) Small Uromyces proeminens var. proeminens Chamaesyce hirsuta (Torr.) Arth. Uromyces proeminens var. proeminens Chamaesyce humistrata (Englem.) Small Uromyces proeminens var. euphorbiicola Chamaesyce serphyllifolia (Pers.) Small Uromyces proeminens var. proeminens Chenopodium album L. Puccinia aristidae Uromyces peckianus Cheirinia cheiranthoides (L.) Link Puccinia aristidae Chiogenes hispidula (L.) T. & G. Chrysomyxa chiogenis Chrysopsis hirsutissima Greene Puccinia stipae Cichorium intybus L. Puccinia hieracii Cicuta maculata L. Puccinia cicutae Cicuta occidentalis Greene Puccinia cicutae Uromyces scirpi Cinna arundinacea L. Puccinia graminis Cinna latifolia (Trev.) Gries. Puccinia graminis Circaea alpina L. Puccinia circaeae Circaea latifolia Mill. Puccinia circaeae Circaee pacifica Asch. & Magn. Puccinia circaeae Cirsium arvense (L.) Scop. Puccinia suaveolens (P. obtegens) Cirsium flodmanii (Rydb.) Arth. Puccinia cirsii Uromyces junci Cirsium lanceolatum (L.) Hill Puccini cnici Cirsium megacephalum (Gray) Cockerel! Uromyces junci Cirsium undulatum (Nutt.) Spreng. Puccinia cirsii Uromyces junci Cirsium spp. Puccinia cirsii Clarkia spp. Pucciniastrum pustulatum Claytonia caroliniana Michx. Puccinia mariae-wilsoni Claytonia virginica L. Puccinia mariae-wilsoni Clematis ligusticifolia Nutt. Puccinia rubigo-vera var. agropyri Clinopodium vulgare L. Puccinia menthae Clintonia borealis (Ait.) Raf. Puccinia mesomajalis Clintonia uniflora (Schult.) Kunth Puccinia mesomajalis Collomia linearis Nutt. Uromyces acuminatum var. polemonii Comandra livida Richards. Cronartium comandrae Puccinia comandrae Comandra pallida A. DC. Cronartium comandrae Puccinia andropogonis var. pustulata P. comandrae Comandra umbellata (L.) Nutt. Cronartium comandrae Puccinia andropogonis var. pustulata Convallaria sp. Puccinia sessilis Convolvulus sepium L. Puccinia convolvuli Cornus canadensis L. Puccinia porphyrogenita Cotoneaster lucida Gymnosporangium clavipes Crataegus chrysocarpa Ashe Gymnosporangium betheli G. clavariaeforme Crataegus coccinea L. Gymnosporangium globosum Crataegus douglasii Lindl. Gymnosporangium betheli 38 Crataegus punctata Jacq. Gymnosporangium clavipes G. globosum Crataegus tomentosa L. Gymnosporangium globosum Crataegus spp. Gymnosporangium clavariaeforme G. clavipes G. globosum G. tubulatum G. betheli Crepis runcinata (James) Torr. & Gray Puccinia hieracii Cryptogramma acrostichoides R. Br. Milesia darkeri Cryptotaenia canadensis (L.) DC. Puccinia cryptotaeniae P. microica Cydonia olbonga Mill. Gymnosporangium clavariaeforme G. clavipes Cydonia sp. Gymnosporangium clavipes Cyperus strigosus L. Puccinia canaliculata Cypripedium parviflorum Salisb. Puccinia cypripedii Dactylis glomorata L. Puccinia graminis Uromyces dactylidis Dasiphorafruticosa(L.) Rydb. (Potentillaf. L.) Phragmidium andersoni Decodon verticillatus (L.) Ell. Puccinia minutissima Deschampsia atropurpurea (Wahl.) Scheele P. praegracilis var. connersii Deschampia caespitosa (L.) Beauv. Puccinia coronata P. graminis P. poae-sudeticae var. airae Desmodium dillenii Darl. Uromyces hedysari-paniculati Dianthus caryophyllus L., cult. Uromyces caryophyllinus Distichlis spicata (L.) Greene Puccinia aristidae Uromyces peckianus Dodecatheon jeffreyi Moore Puccinia ortonii Dodecatheon pauciflorum (Durand) Greene Puccinia ortonii Uromyces acuminatus var. steironematis Draba arabisans Michx. Puccinia drabae Draba incerta Payson Puccinia drabae Draba lutea Gilib. Puccinia aristidae Draba sp. Puccinia drabae Dryopteris marginalis (L.) Gray Milesia marginalis Dryopteris spinulosa (O. F. Muell.) Watt. Milesia fructuosa Dryopteris thelypteris (L.) Gray Uredinopsis struthiopteridis Elaeagnus angustifolia L. Puccinia caricis-shepherdiae Elaeagnus commutata Bernh. Puccinia caricis-shepherdiae P. coronata Eleocharis palustris (L.) R. & S. Puccinia eleocharidis Eleocharis spp. Puccinia eleocharidis Elymus canadensis L. Puccinia coronata P. graminis P. montanensis P. rubigo-vera var. impatientis Elymus curvatus Piper Puccinia graminis P. montanensis P. rubigo-vera var. agropyrina Elymus dahuricus Turcz. Puccinia graminis P. montanensis Elymus diversiglumis Scribn. & Ball Puccinia rubigo-vera var. agropyri P. rubigo-vera var. agropyrina Elymus glaucus Buckl. Puccinia glumarum Elymus howellii Scribn. & Merr. Puccinia glumarum Elymus innovatus Beal Puccinia coronata Elymus jejunus (Ramaley) Rydb. Puccinia montanensis P. rubigo-vera var. agropyrina Elymus macounii Vasey Puccinia graminis P. rubigo-vera var. agropyri P. rubigo-vera var. agropyrina Elymus marginalis Rydb. Puccinia glumarum Elymus vancouverensis Vasey Puccinia rubigo-vera var. agropyri Elymus virginicus L. Puccinia graminis P. rubigo-vera var. agropyrina P. rubigo-vera var. impatientis Empetrum atropurpureum Fern. & Wieg. Chrysomyxa empetri Empetrum eamesii Fern. & Wieg. Chrysomyxa empetri Empetrum nigrum L. Chrysomyxa empetri Epilobium adenocaulon Haussk. Puccinia vagans var. epilobii-tetragoni Pucciniastrum pustulatum Epilobium alpinum L. Puccinia epilobii 39 Epilobium angustifolium L. (Chamaenerion spicatum (Lam.) S.F. Gray) Puccinia extensicola var. oenotherae Pucciniastrum pustulatum Epilobium coloratum MuhL Pucciniastrum pustulatum Epilobium hirsutum L. Pucciniastrum pustulatum Epilobium hornemannii Reichenb. Puccinia veratri Epilobium minutum Lindl. Puccinia oenotherae Epilobium spp. Puccinia epilobii P. scandica Pucciniastrum pustulatum Puccinia vagans var. epilobii-tetragoni Erigenia bulbosa (Michx.) Nutt. Puccinia erigeniae Eriogonum flavum Nutt. Uromyces intricatus Eriophorum angustifolium Roth Puccinia angustata Eriophorum viridicarinatum (Engelm.) Fern. Puccinia angustata Erysimum cheiranthoides L. (Cheirinia c. (L.) T. & G.) Puccinia aristidae Erythronium grandiflorum Pursh Uromyces heterodermus Eupatorium perfoliatum L. Puccinia eleocharidis Eupatorium purpureum L. Puccinia eleocharidis Eupatorium purpureum var. maculatum (L.) Darl. Puccinia eleocharidis Euphorbia cyparissias L. Uromyces striatus Euthamia graminifolia (L.) Nutt. (Solidago g. (L.) Salish.) Puccinia extensicola var. euthamii Festuca elatior L. Puccinia graminis Festuca myuros L. Puccinia graminis Festuca ovina L. Puccinia crandallii Festuca rubra L. Puccinia rubigo-vera var. agropyri Festuca saximontana Rydb. Puccinia crandallii Festuca scabrella Torr. Puccinia cockerelliana Festuca spp. Puccinia coronata Filix bulbifera (L.) Underw. Uredinopsis struthiopteridis Filix fragilis (L.) Gilib. Hyalopsora polypodii Fluminia festucacea (Willd.) Hitchc. (Scolochloa festucacea (Willd.) Link) Puccinia coronata Fraxinus americana L. Puccinia sparganioides Fraxinus pennsylvanica Marsh, var. lanceolata (Borkh.) Sarg. Puccinia sparganioides Fritillaria kamtschatcensis Ker. Uromyces miurae Galium aparine L. Puccinia difformis Galium asprellum Michx. Puccinia punctata Galium boreale L. Puccinia rubefaciens Galium trindum L. Puccinia punctata Galium triflorum Michx. Pucciniastrum galii Puccinia punctata var. troglodytes Gaylussacia baccata (Wang.) K. Koch Pucciniastrum myrtilli Gaura coccinea Nutt. Uromyces plumbarius Gentiana affinis Griesb. Puccinia gentianae Gentiana amarella L. var. acuta (Michx.) Herder Puccinia haleniae Gentiana andrewsii Gries. Puccinia gentianae Gentiana interrupta Greene Puccinia gentianae Gentiana strictiflora (Rydb.) A Nels. Uromyces gentianae Geranium maculatum L. Puccinia polygoni-amphibii var. persi- cariae Geranium spp. Uromyces geranii Gilia linearis (Nutt.) Gray Uromyces acuminatus var. polemonii Glaux maritima L. Puccinia aristidae P. distichlidis Glyceria grandis W7ats. Puccinia graminis P. rubigo-vera var. agropyrina Glycyrrhiza lepidota Nutt. Uromyces glycyrrhizae Gnaphalium macounii Greene Puccinia investita Godetia spp. Pucciniastrum pustulatum Grindelia perennis Nels. Puccinia grindeliae Grindelia squarrosa (Pursh) Dunal Puccinia grindeliae 40 Grossularia cynosbati (L.) Mill. Cronartium ribicola Puccinia caricis var. grossulariata P. caricis var. uniporula Grossularia divaricata (Dougl.) Cov. & Britt. Cronartium ribicola Melampsora ribesii-purpureae Puccinia parkerae Grossularia hirtella (Michx). Spach Puccinia caricis var. grossulariata Grossularia setosa (Lindl.) Cov. & Britt. Puccinia caricis var. grossulariata Habenaria dilatata (Pursh) Hook. Puccinia praegracilis var. connersii Habenaria gracilis Wats. Aecidium graebnerianum Puccinia praegracilis var. praegracilis Habenaria psycodes (L.) Sw. Aecidium graebnerianum Hedysarum americanum (Michx.) Britt. Uromyces hedysari-obscuri Hedysarum boreale Nutt. Uromyces hedysari-obscuri Hedysarum cinerascens Rydb. Uromyces hedysari-obscuri Hedysarum mackenzii Richards. Uromyces hedysari-obscuri Hedysarum sulphurascens Rydb. Uromyces hedysari-obscuri Helianthus annuus L., cult. Puccinia helianthi Helianthus aridus Rydb. Puccinia helianthi Helianthus fascicularis Greene Puccinia helianthi Helianthus giganteus L. Puccinia helianthi Helianthus petiolaris Nutt. Puccinia helianthi Uromyces junci Helianthus rigidus (Cass.) Desf. Puccinia helianthi Helianthus strumosus L. Puccinia helianthi Helianthus subrhomboideus Rydb. Puccinia helianthi Uromyces junci Helianthus subtuberosus Bourg. Puccinia helianthi Uromyces junci Helianthus tuberosus L. Puccinia helianthi Uromyces junci Hepatica acutiloba DC. Tranzschelia pruni-spinosae Heuchera cylindrica Dougl. var. glabella (T. & G.) VVheelock Puccinia heucherae var. heucherae Heuchera cylindrica var. trionalis R. B. & L. Puccinia heucherae var. saxifragae Heuchera glabra VVilld. Puccinia heucherae var. heucherae Heuchera micrantha Dougl. ex Lindl. Puccinia heucherae var. heucherae Heuchera ovalifolia Nutt. Puccinia heucherae var. heucherae P. heucherae var. saxifragae Heuchera richardsonii R. Br. Puccinia heucherae var. saxifragae Hieracium albiflorum Hook. Aecidium columbiense Hieracium canadense Michx. Puccinia hieracii Hieracium scabriusculum Schw. Puccinia extensicola var. hieraciata P. hieracii Hieracium scabrum Michx. Puccinia fraseri P. hieracii Hierochloe odorata (L.) Wahl. Puccinia coronata Holcus lanatus L. Puccinia coronata P. rubigo-vera var. agropyri Honkenya pepioides (L.) Ehrh. Puccinia arenariae Hordeum caespitosum Scribn. Puccinia glumarum Hordeum jubatum L. Puccinia glumarum P. graminis P. montanensis P. rubigo-vera var. agropyri P. rubigo-vera var. agropyrina P. rubigo-vera var. impatientis Hordeum murinum L., cult. Puccinia graminis Hordeum vulgare L., cult. Puccinia graminis P. hordei (P. anomala) P. glumarum Houstonia longifolia Gaertn. Uromyces houstoniatus Hypericum kalmianum L. Uromyces hyperici Hypericum perforatum L. Uromyces hyperici Hypericum prolificum L. Uromyces hyperici Hypericum virginicum L. (Triadenum v. (L.) Raf.) Uromyces hyperici U. sparganii Hystrix patula Moench Puccinia rubigo-vera var. agropyrina Impatiens balsamina L. Cronartium flaccidum Impatiens biflora Walt. Puccinia argentata P. rubigo-vera var. impatientis Impatiens noli-tangere L. Puccinia argentata 41 Impatiens pallida Nutt. Puccinia argentata P. rubigo-vera var. impatientis Iris versicolor L. Puccinia iridis P. sessilis Iris sp. Puccinia iridis Iva axillaris Pursh Puccinia intermixta Juncus ater Rydb. Uromyces junci Juncus balticus Willd. Uromyces junci U. junci-effusi Juncus longistylis Torr. Uromyces silphii Juncus tenuis Willd. Uromyces silphii Juncus xiphioides E. Mey. Uromyces junci-effusi Juniperus communis L. Gymnosporangium clavipes G. clavariaeforme Juniperus fragrans (cult.) Gymnosporangium globosum Juniperus horizontalis Moench Gymnosporangium corniculans G. juvenescens G. globosum G. clavipes Juniperus scopulorum Sarg. Gymnosporangium nelsoni G. betheli Juniperus sibirica Burgsd. Gymnosporangium clavipes G. juniperinum Juniperus virginiana L. Gymnosporangium clavipes G. globosum G. nidus-avis G. juniperi-virginianae G. corniculans Juniperus spp. Gymnosporangium clavipes G. globosum Koeleria cristata (L.) Pers. Puccinia koeleriae P. monoica Lactuca pulchella (Pursh) DC. Puccinia extensicola var. hieraciata P. minussensis Lactuca sativa L., cult. Puccinia extensicola var. hieraciata Lamarkia aurea (L.) Moench (Achyrodes a Ktze.) Puccinia coronata Lappula echinata Gilib. Puccinia aristidae Lapsana communis L. Puccinia lapsanae Larix laricina (DuRoi) Koch Melampsora bigelowii M. medusae Larix lyallii Pari. Melampsora bigelowii Lathyrus myrtifolius Muhl. Uromyces fabae Lathyrus ochroleucus Hook. Uromyces fabae Lathyrus venosus Muhl. Uromyces fabae Ledum glandulosum Nutt. Chrysomyxa ledi var. glandulosi Ledum groenlandicum Oeder Chrysomyxa ledi var. groenlandici C. ledicola C. woronini Ledum palustre L. var. decumbens Ait Chrysomyxa ledi var. ledi C. ledicola C. woronini Lespedeza capitata Michx. Uromyces lespedezae-procumbentis Lewisia rediviva Pursh Uromyces spragueae Liatris aspera (Michx.) Greene Puccinia liatridis Liatris ligulistylis (A. Nels.) Rydb. Puccinia liatridis Liatris punctata Hook. Puccinia liatridis Ligusticum apiifolium (Nutt.) Gray Puccinia ligustici Ligusticum scothicum L. Aecidium ligustici Lilium canadense L. Uromyces holwayi Lilium columbianum Hanson Uromyces holwayi Lilium michiganense Farwell Uromyces holwayi Lilium umbellatum Pursh Puccinia sporoboli Limonium latifolium Uromyces limonii Limonium nashii Small (not L. carolinianum (Walt.) Britt.) Uromyces limonii-caroliniani Limonium vulgare Uromyces limonii Linum lewisii Pursh Melampsora lini Linum rigidum Pursh Melampsora lini Linum usitatissimum L., cult. Melampsora lini Lobelia syphilitica L. Puccinia lobeliae Lolium multiflorum Lam. Puccinia graminis 42 Lolium perenne L. Puccinia graminis Lonicera caerulea L. Puccinia festucae Lupinus perennis L. Puccinia andropogonis var. onobrychidis Lupinus sp. Uromyces lupini Luzula campestris (L.) DC. var. multiflora (Ehrh.) Celak. Puccinia obscura Luzula carolinae Wats. Puccinia obscura Luzula parviflora (Ehrh.) Desv. Puccinia obscura Lycopus americanus Muhl. Puccinia angustata Lycopus asper Greene Puccinia angustata Lycopus rubellus Moench Puccinia angustata Lycopus uniflorus Michx. Puccinia angustata Lycopus virginicus L. Puccinia angustata Lygodesmia juncea (Pursh) D. Don Puccinia extensicola var. hieraciata P. grindeliae P. stipae Lysimachia thyrsiflora L. Puccinia limosae Madia sativa Molina Coleosporium madiae Mahonia aquifolium (Pursh) Nutt. Puccinia koeleriae Mahonia repens (Lindl.) Don Puccinia koeleriae Mahonia sp. Puccinia graminis Cumminsiella sanguinea Maianthemum canadense Desf. Puccinia amphigena P. sessilis Uromyces acuminatus var. magnatus Malus coronaria (L.) Mill. Gymnosporangium juniperi-virginianae Malus pumila Mill. Gymnosporangium clavipes G. globosum G. juniperi-virginianae Malus rivularis (Doug.) Roem. Gymnosporangium nootkatense Malus sylvestris (L.) Mill. Gymnosporangium juniperi-virginianae Malva moschata L. Puccinia malvacearum Malva rotundifolia L. Pucinia malvacearum Malva spp. Puccinia malvacearum Medicago lupulina L. Uromyces striatus Medicago sativa L. Uromyces striatus Melampyrum lineare Lam. Puccinia adropogonis var. melampyri Mentha arvensis L. Puccinia angustata P. menthae Mentha canadensis L. Puccinia angustata P. menthae Mentha glabrior (Hook.) Rydb. Puccinia angustata P. menthae Mentha piperita L. Puccinia menthae Mentha spicata L. Puccinia menthae Merckia physodes Fisch. Puccinia arenariae Micranthes lyallii (Engler) Small Puccinia heucherae var. heucherae Milium effusum L. Puccinia graminis Mitella breweri Gray Puccinia heucherae var. austroberingiana Mitella diphylla L. Puccinia heucherae var. heucherae Mitella nuda L. Aecidium mitellae Puccinia heucherae var. heucherae Mitella ovalis Greene Puccinia heucherae var. heucherae Mitella trifida Graham Puccinia heucherae var. austroberingiana Moehringia lateriflora (L.) Fenzl Puccinia arenariae Uromyces acuminatus var. spartinae Monarda didyma L. Puccinia menthae Monarda fistulosa L. Puccinia menthae Monarda menthaefolia Benth. Puccinia menthae Monarda mollis L. Puccinia menthae Monarda mollis var. menthaefolia Fern Puccinia menthae Moneses uniflora (L.) Gray Chrysomyxa monesis C. pirolata Pucciniastrum pyrolae Muhlenbergia cuspidata (Torr.) Rydb. Puccinia schedonnardi Muricauda dracontium (L.) Small Uromyces caladii Myrica gale L. Cronartium comptoniae Nabalus albus (L.) Hook. Puccinia extensicola var. hieraciata Nabalus altissimus (L.) Hook. Puccinia orbicula 43 Nabalus racemosus (Michx.) DC. Puccinia maculosa P. orbicula Nabalus trifoliolatus Cass. Puccinia orbicula Nabalus sp. Puccinia orbicula Naumburgia thyrsiflora (L.) Duby Puccinia limosae Nemexia herbacea (L.) Small Puccinia amphigena Nemexia lasioneuron (Hook.) Rydb. Puccinia amphigena Oenothera biennis L. Puccinia extensicola var. oenotherae Onoclea sensibilis L. Uredinopsis mirabilis Onopordum acanthium L. Puccinia onopordi Onosmodium occidentale Mackenzie Puccinia rubigo-vera var. apocrypta Oryzopsis asperifolia Michx. Puccinia pygmaea Osmorrhiza claytoni (Michx.) Clarke Puccinia pimpinellae Osmorrhiza longistylis (Torr.) DC. Puccinia pimpinellae Osmunda claytoniana L. Uredinopsis osmundae Osmunda spectabilis Willd. Uredinopsis osmundae Oxyria digyna (L.) Hill. Puccinia oxyriae Oxytropis gracilis (A. Nels.) K. Schum. Uromyces punctatus Padus nana (DuRoi) Roem. Tranzschelia pruni-spinosae Panicum capillare L. Puccinia emaculata Parnassia fimbriata Banks Puccinia parnassiae Parnassia palustris L. Puccinia uliginosa Pentstemon acuminatus Dougl. Puccinia andropogonis var. pentstemonis Pentstemon albidus Nutt. Puccinia andropogonis var. pentstemonis Pentstemon eriantherus Pursh Puccinia andropogonis var. pentstemonis Pentstemon nitidus Dougl. Puccinia andropogonis var. pentstemonis Petalostemon candidus (Willd.) Michx. Puccinia andropogonis var. onobrychidis Petalostemon oligophyllus (Torr.) Rydb. Uropyxis petalostemonis Petalostemon purpureus (Vent.) Rydb. Puccinia andropogonis var. onobrychidis Petasites frigidus (L.) Fries Puccinia conglomerata Petasites palmatus (Ait.) A. Gray Puccinia conglomerata Phaca frigida L. Uromyces lapponicus Phacelia franklinii (R. Br.) Gray Puccinia rubigo-vera var. apocrypta Phacelia heterophylla Pursh Puccinia rubigo-vera var. apocrypta Phalaris arundinacea L. Puccinia sessilis Phalaris canariensis L. Puccinia graminis Phaseolus vulgaris L. Uromyces phaseoli Phegopteris dryopteris (L.) Fee Uredinopsis phegopteridis Hyalopsora aspidiotus Phleum pratense L. Puccinia graminis var. phlei-pratensis Phlox hoodii Richards.- Puccinia douglasii Phlox sp. Uromyces acuminatus var. polemonii Phragmites communis Trin. Puccinia magnusiana P. phragmitis Physalis heterophylla Nees Puccinia physalidis Physalis virginiana Mill. Puccinia physalidis Picea engelmanni (Parry) Engelm. Chrysomyxa empetri C. ledicola C. weirii Melampsorella cerastii Picea excelsa (Lam.) Link Melampsorella cerastii Picea glauca (Moench) Voss (P. canadensis (Mill.) B.S.P.) Chrysomyxa chiogenis C. empetri C. ledi var. cassandrae C. ledicola C. pirolata Melampsorella cerastii Pucciniastrum arcticum P. americanum Picea glauca var. albertiana (S. Brown) Sarg. (P. albertiana S. Brown.) Chrysomyxa ledicola C. pirolata Melampsorella cerastii Picea mariana (Mill.) B.S.P. Chrysomyxa chiogenis C. empetri C. ledi C. ledi var. groenlandici C. ledicola C. pirolata C. woronini Melampsorella cerastii Picea pungens Engelm. Chrysomyxa ledi C. ledicola 44 Picea rubens Sarg. Chrvsomvxa empetri C. ledi C. ledi var. cassandrae C. ledi var. groenlandica C. ledicola C. weirii Picea sitchensis (Bong.) Carr. Chrysomyxa ledicola C. monesis C. weiri Picea sp. Chrysomyxa weirii Pinus banksiana Lamb. Coleosporium solidaginis Cronartium comandrae C. comptoniae Pinus contorta Dougl. Coleosporium solidaginis Cronartium coleosporioides C. comandrae Pinus ponderosa Dougl. Cronartium coleosporioides C. comandrae Pinus spp. Cronartium comandrae C. ribicola Pisum sativum L. Uromyces fabae Plantago eriopoda Torr. Puccinia aristidae Uromyces peckianus Pleurogyne rotata Griesb. Uromyces gentianae Poa annua L. Puccinia poae-nemoralis Poa arida Vasey Puccinia rubigo-vera var. agropyri Poa compressa L. Puccinia graminis P. poae-nemoralis Poa crocata Michx. Puccinia poae-nemoralis Uromyces dactylidis Poa interior Rydb. Puccinia poae-nemoralis Poa nemoralis L. Puccinia poae-nemoralis Poa palustris L. Puccinia poae-nemoralis Poa pratensis L. Puccinia poae-nemoralis Uromyces dactylidis Poa sandbergii Vasey Puccinia rubigo-vera var. agropyri Poa trivialis L. Uromyces dactylidis Poa spp. Puccinia graminis var. poae P. poae-nemoralis Podophyllum peltatum L. Puccinia podophylli Polygala paucifolia Willd. Puccinia pyrolae Polygala senega L. Puccinia andropogonis var. polygalina Polygonum aviculare L. Uromyces polygoni Polygonum buxiforme Small Uromyces polygoni Polygonum coccineum (Muhl.) Pers. Puccinia polygoni-amphibii var. persic- ariae Polygonum convolvulus L. Puccinia polygoni-amphibii var. convol- vuli Polygonum erectum L. Puccinia aristidae Uromyces polygoni Polygonum fowleri Rob. Uromyces polygoni Polygonum harvvrightii Gray Puccinia polygoni-amphibii var. persic- ariae Polygonum hydropiperoides (Michx.) Small Puccinia polygoni-amphibii var. persic- ariae Polygonum lapathifolium L. Puccinia polygoni-amphibii var. persic- ariae Polygonum muhlenbergii (Meisn.) Wats. Puccinia polygoni-amphibii var. persic- ariae Polygonum neglectum Besser Puccinia aristidae Polygonum pensylvanicum L. Puccinia polygoni-amphibii var. persic- ariae Polygonum persicaria L. Puccinia polygoni-amphibii var. persic- ariae Polygonum ramosissimum Michx. Uromyces polygoni Polygonum rubescens Small Uromyces polygoni Polygonum spergulariaeforme Meissn. Uromyces polygoni Polypodium virginianum L. Milesia polypodophila Populus acuminata Rydb. Melampsora occidentalis Populus balsamifera L. (P. tacamahacca Mill.) Melampsora medusae M. occidentalis Populus deltoides Marsh. Melampsora medusae Populus grandidentata Michx. Melampsora abietis-canadensis Populus sargentii Dode Melampsora medusae Populus termuloides Michx. Melampsora abietis-canadensis M. albertensis M. medusae 45 Populus trichocarpa T. & G. Melampsora occidentalis Populus spp. Melampsora medusae Potentilla bipinnatifida Dougl. Phragmidium ivesiae P. potentillae Potentilla canadensis L. Frommea obtusa Potentilla concinna Richards. Phragmidium ivesiae Potentilla diversifolia Lehm. Phragmidium ivesiae Potentilla flabelliformis Lehm. Phragmidium ivesiae Potentilla fruticosa L. Phragmidium andersoni Potentilla glabrella Rydb. Phragmidium potentillae Potentilla glaucophylla Lehm. Phragmidium ivesiae Potentilla glomerata Nels. Phragmidium ivesiae Potentilla hippiana Lehm. Phragmidium potentillae P. ivesiae Potentilla nuttallii Lehm. Phragmidium ivesiae Potentilla pectinata Raf. Phragmidium potentillae Potentilla pennsylvanica L. Phragmidium potentillae Potentilla strigosa Pall. Phragmidium potentillae Potentilla tridentata Ait. (Sibbaldiopsis t.) Pucciniastrum potentillae Potentilla spp. Phragmidium invesiae P. potentillae Prenanthes, see Nabalus Prunus domestica L. Tranzschelia pruni-spinosae Pseudotsuga taxifolia (Poir.) Britt. (P. mucro- nata (Raf.) Sudvv.) Melampsora albertensis M. occidentalis Psilactis asteroides Gray Puccinia asteris Psoralea argophylla Pursh Uromyces psoraleae var. argophyllae Psoralea lanceolata Pursh Uromyces psoraleae var. psoraleae Psoralea physodes Dougl. Uromyces abbreviatus Pteridium aquilinum pubescens Underw. Uredinopsis macrosperma Pteretis nodulosa (Michx.) Nieuwl. Uredinopsis struthiopteridis Puccinellia maritima (Huds.) Pari. Puccinia rubigo-vera var. agropyrina Puccinellia nuttalliana (Schult.) Hitchc. Puccinia rubigo-vera var. agropyri Puccinellia tenuiflora (Griesb.) Scribn. & Merr. Puccinia rubigo-vera var. agropyri P. rubigo-vera var. agropyrina Pulsatilla ludoviciana (Nutt.) Heller Tranzschelia suffusca Puccinia pulsatillae Pycnanthemum flexuosum (Walt.) B.S.P. Puccinia menthae Pycnanthemum virginianum (L.) Dur. & Jacks. Puccinia menthae Pyrola americana Sweet Chrysomyxa pirolata Pyrola asarifolia Michx. Chrysomyxa pirolata Pucciniastrum pyrolae Pyrola bracteata Hook. Chrysomyxa pirolata Pyrola chlorantha Sw. (P. virens Schweigg.) Chrysomyxa pirolata Pucciniastrum pyrolae Pyrola elliptica Nutt. Chrysomyxa pirolata Pucciniastrum pyrolae Pyrola grandifolia Radius Chrysomyxa pirolata Pyrola minor L. Chrysomyxa pirolata Pyrola picta Smith Chrysomyxa pirolata Pyrola rotundifolia Michx. Pucciniastrum pyrolae Pyrola secunda L. Chrysomyxa pirolata Pucciniastrum pyrolae Pyrola uliginosa T. & G. Chrysomyxa pirolata Pyrus communis L. Gymnosporangium clavariaeforme Pyrus sp. Gymnosporangium clavipes Ranunculus abortivus L. Puccinia eatoniae var. ranunculi Ranunculus acris L. Puccinia rubigo-vera var. agropyrina Ranunculus affinis R.Br. Puccinia rubigo-vera var. agropyrina Ranunculus cariophyllus Hook. Puccinia rubigo-vera var. agropyrina Ranunculus cymbalaria Pursh Puccinia rubigo-vera var. agropyri P. rubigo-vera var. agropyrina Ranunculus macounii Britt. Uromyces alopecuri Ranunculus micranthus Nutt. Uromyces alopecuri Ranunculus recurvatus Poir. Tranzschelia pruni-spinosae Ranunculus repens L. Uromyces dactylidis Ranunculus sceleratus L. Uromyces alopecuri 46 Ranunculus suksdorfii Gray Puccinia ranunculi Rhamnus alnifolia L'Her. Puccinia coronata var. calamagrostis Rhamnus cathartica L. Puccinia coronata var. avenae Rhamnus davurica Pall. Puccinia coronata Rhamnus frangula L. Puccinia coronata var. agrostis Rhamnus purshiana DC. Puccinia coronata Rhamnus utilis Decne. Puccinia coronata Rheum rhaponticum L. Puccinia phragmites Rhododendron lapponicum (L.) Wahl. Chrysomyxa ledi var. rhododendri Rhodora canadensis (L.) Carr. Pucciniastrum myrtilli Rhus aromatica Ait. Pileolaria toxicodendri Rhus radicans L. Pileolaria toxicodendri Rhus toxicodendron auct. Pileolaria toxicodendri Rhynchospora alba (L.) Vahl Uromyces rhyncosporae Ribes americanum Mill. Puccinia caricis var. grossulariata Ribes bracteosum Dougl. Cronartium ribicola Puccinia caricis var. grossulariata Ribes echinatum Lindl. Cronartium ribicola Melampsora ribesii-purpureae Puccinia parkerae Ribes glandulosum Gauer Puccinia caricis var. grossulariata Ribes grossularia L. Cronartium ribicola Puccinia caricis var. grossulariata Ribes hudsonianum Richards. Puccinia caricis var. grossulariata Ribes lacustre (Pers.) Poir. Puccinia caricis var. grossulariata P. parkerae Ribes laxiflorum Pursh Puccinia caricis var. grossulariata Ribes nigrum L. Cronartium ribicola Puccinia caricis var. grossulariata Ribes setosum Lindley Puccinia caricis var. grossulariata Ribes triste Pallas Puccinia ribis Ribes spp. Cronartium ribicola Puccinia caricis var. grossulariata Rosa acicularis Lindl. Phragmidium rosae-acicularis Rosa blanda Ait. Phragmidium americanum P. montivagum P. speciosum Rosa bourgeauiana Crepin Phragmidium montivagum P. rosae-acicularis Rosa californica C. & S. Phragmidium rosae-californicae Rosa gymnocarpa Nutt. Phragmidium rosae-californicae Rosa macounii Greene Phragmidium speciosum Rosa nutkana Presl Phragmidium rosae-acicularis P. rosae-californicae Rosa pisocarpa Gray Phragmidium rosae-californicae Rosa suffulta Greene Phragmidium rosicola P. rosae-acicularis P. rosae-arkansanae Rosa virginiana Mill. Phragmidium americanum P. speciosum Rosa spp. Phragmidium americanum P. disciflorum P. rosae-pimpinellifoliae P. rosae-arkansanae P. rosae-acicularis P. rosae-californicae P. rosicola P. speciosum P. subcorticinurn P. montivagum Rubus acaulis Michx. Gymnoconia peckiana Pucciniastrum arcticum Rubus arcticus L. Gymnoconia peckiana Pucciniastrum arcticum Rubus idaeus L. var. strigosus Maxim. Phragmidium rubi-idaei Rubus leucodermis Dougl. Phragmidium rubi-idaei Rubus melanolasius Focke Pucciniastrum americanum Phragmidium rubi-idaei Rubus nigrobaccus Bailey Gymnoconia peckiana Rubus occidentalis L. Phragmidium rubi-idaei Rubus odoratus L. Phragmidium rubi-odorati Rubus parviflorus Nutt. Phragmidium occidentale Rubus procumbens Muhl. Kuenhneola uredinis Rubus pubescens Raf. Kuehneola uredinis Pucciniastrum arcticum 47 Rubus randii (Bailey) Rydb. Gymnoconia peckiana Rubus strigosus Michx. Phragmidium rubi-idaei Pucciniastrum americanum Rubus triflorus Richards. Gymnoconia peckiana Puccinastrum arcticum Rubus spp. Gymnoconia peckiana Phragmidium rubi-idaei Pucciniastrum americanum P. arcticum Rudbeckia ampla A. Nels. Uromyces perigynius Rudbeckia laciniata L. Uromyces perigynius U. rudbeckiae Rumex britannica L. Puccinia ornata Rumex mexicanus Meisn. Puccinia phragmitis Rumex occidentalis S. Wats. Puccinia ornata P. phragmitis Rumex sp. Puccinia ornata Sa Sa Sa Sa Sa Sa Sa Sa Sa Sa Sa Sa Sa Sa Sa Sa icornia herbacea L. Uromyces peckianus icornia pacifica Standi. Uromyces peckianus ix alba L. var. vitellina L. Melampsora abieti-capraearum ix amygdaloides Anders. Melampsora bigelowii ix anglorum Cham. Melampsora arctica ix arbusculoides Anders. Melanpsora arctica ix balsamifera (Hook.) Barratt Melampsora arctica ix bebbiana Sarg. Melampsora abieti-capraearum M. ribesii-purpurea ix Candida Flugge Melampsora abieti-capraearum ix cordata Muhl. Melampsora abieti-capraearum ix glaucops Anders. Melampsora arctica ix myrtillifolia Anders. Melampsora arctica ix petrophila Rydb. Melampsora arctica ix purpurea L. var. gracilis Anders. Melampsora abieti-capraearum ix rubra Richards. Melampsora abieti-capraearum ix spp. Melampsora bigelowii M. arctica Sanicula marilandica L. Puccinia marylandica Sanicula sp. Puccinia marylandica Sarcobatus vermiculatus (Hook.) Torn Puccinia aristidae Saxifraga aizoides L. Puccinia pazschkei var. jueliana Saxifraga bronchial is L. Puccinia pazschkei var. tricuspidatae Saxifraga cernua L. Puccinia heucherae var. saxifragae Saxifraga ferruginea Graham Puccinia pazschkei var. jueliana Saxifraga hieracifolia Waldst. & Kit. Puccinia heucherae var. saxifragae Saxifraga lyallii Engler (Micranthes 1. (Engler) Small Puccinia heucherae var. heucherae Saxifraga mertensiana Bong. Puccinia pazschkei var. heterisiae Saxifraga nivalis L. Puccinia heucherae var. saxifragae Saxifraga occidentalis S. Wats. ssp. rufidulus (Small) Basigalupi Puccinia heucherae var. saxifragae Saxifraga oppositifolia L. Puccinia fischeri P. pazschkei var. oppositifoliae Saxifraga punctata sspp. Puccinia heucherae var. austroberingiana Saxifraga rivularis L. Puccinia heucherae var. saxifragae Saxifraga tenuis (Wallr.) Sm. Puccinia heucherae var. saxifragae Saxifraga tricuspidata Rottb. (Leptasea t. (Rottb.) Haw.) Puccinia pazschkei var. tricuspidatae Saxifraga virginiensis Michx. Puccinia heucherae var. saxifragae Scirpus atrovirens Muhl. Puccinia angustata Scirpus cyperinus (L.) Kunth Puccinia angustata Scirpus fluviatilis (Torr.) Gray Uromyces scirpi Scirpus microcarpus Presl Puccinia angustata P. mcclatchieana Scirpus paludosus A. Nels. Uromyces scirpi Scirpus validus Vahl Puccinia obtecta Uromyces scirpi Scolochloa festucacea (Willd.) Link Puccinia coronata Sedum stenopetalum Pursh Puccinia rydbergii Secale cereale L. Puccinia graminis P. rubigo-vera var. secalis Sempervivum tectorum L. Endophyllum sempervivi 48 Senecio columbianus Greene Puccinia extensicola var. hieraciata Senecio flavulus Greene Puccinia extensicola var. hieraciata Senecio triangularis Hook. Puccinia angustata P. subcircinata Senecio willingii Greenm. Puccinia recedens Shepherdia argentea Nutt. Puccinia caricis-shepherdiae Shepherdia canadensis (L.) Nutt. Puccinia caricis-shepherdiae P. coronata Sibbaldiopsis tridentata (Sol.) Rydb. Pucciniastrum potentillae Sideranthus spinulosus (Pursh) Sweet Puccinia grindeliae Sisymbrium altissimum L. Puccinia aristidae Sium cicutaefolium Schrank Uromyces scirpi Smilacina stellata (L.) Desf. Puccinia amphigena P. sessilis Uromyces acuminatus var. magnatus Smilax herbacea L. Puccinia amphigena . Solidago canadensis L. Coleosporium solidaginis Solidago gilvocanescens (Rydb.) Smyth Coleosporium solidaginis Solidago glaberrima Mart. Puccinia stipae Solidago glabrum Mart. Coleosporium solidaginis Solidago mollis Bartl. Puccinia stipae Solidago multiradiata Ait. Coleosporium solidaginis Solidago nemoralis Ait. Puccinia extensicola var. solidaginis Solidago patula Muhl. Coleosporium solidaginis Solidago puberula Nutt. Puccinia virgaureae Solidago rigida L. Puccinia extensicola var. solidaginis P. stipae Solidago serotina Ait. Coleosporium solidaginis Puccinia extensicola var. solidaginis Solidago uliginosa Nutt. Coleosporium solidaginis Solidago sp. Puccinia stipae Sorbus americana Marsh. Gymnosporangium aurantiacum (G. cor- nutum) .Sorbus occidentalis (Wats.) Greene Gymnosporangium nootkatense G. juniperinum (G. tremelloides) Sorbus scopulina Greene Gymnosporangium aurantiacum (G. cor- nutum) G. juniperinum (G. tremelloides) Sorbus sitchensis Roem. Gymnosporangium juniperinum (G. tre- melloides) Sparganium eurycarpum Engelm. Uromyces sparganii Spartina alterniflora Loisel. Uromyces acuminatus Spartina gracilis Trin. Puccinia distichlidis Uromyces acuminatus Spartina pectinata Link (S. michauxiana Hitchc.) Puccinia distichlidis P. seymouriana P. sparganioides Uromyces acuminatus Spartina spp. Puccinia distichlidis Spergularia canadensis (Pers.) D. Don Uromyces acuminatus var. spartinae Sphaeralcea coccinea (Nutt.) Rydb. Puccinia sherardiana Sphenopholis obtusata (Michx.) Scribn. Puccinia eatoniae Sphenopholis pallens (Spreng.) Scribn. Puccinia eatoniae Spinacia oleracea L. Puccinia aristidae Sporobolus cryptandrus (Torr.) Gray Puccinia graminis Steironema ciliatum (L.) Raf. Puccinia dayi P. distichlidis Stellaria graminea L. Melampsorella cerastii Stellaria longifolia Muhl. Puccinia arenariae Stellaria longipes Goldie Puccinia arenariae Melampsorella cerastii Stipa comata Trin. & Rupr. Puccinia stipae Stipa spartea Trin. Puccinia stipae Stipa tweedyi Scribn. & Vasey Puccinia stipae Stipa viridula Trin. Puccinia scaber Suaeda maritima (L.) Dumort Uromyces peckianus Symphoricarpos albus (L.) Blake Puccinia crandallii P. symphoricarpi Symphoricarpos occidentalis Hook. Puccinia crandallii Symphoricarpos spp. Puccinia crandallii 49 Taraxacum dumetorum Greene Puccinia hieracii Taraxacum kok-saghyz Rod. Puccinia hieracii Taraxacum vulgare (Lam.) Schr. Puccinia hieracii P. variabilis Tellima grandiflora (Pursh) Dougl. Puccinia heucherae var. austroberingiana Thalictrum alpinum L. Puccinia rubigo-vera var. agropyri Thalictrum dasycarpum Fisch. & Lall. Puccinia rubigo-vera var. agropyrina Tranzschelia thalictri Thalictrum dioicum L. Puccinia rubigo-vera var. agropyri Thalictrum polygamum Muhl. Tranzschelia thalictri Thalictrum venulosum Trel. Puccinia rubigo-vera var. agropyri P. rubigo-vera var. agropyrina Tranzschelia thalictri Thalictrum sp. Tranzschelia thalictri Thlaspi arvense L. Puccinia aristidae Tiarella cordifolia L. Puccinia heucherae var. heucherae Tiarella unifoliata Hook. Puccinia heucherae var. heucherae Tolmiea menziesii (Pursh) T. & G. Puccinia heucherae var. heucherae Trautvetteria grandis Nutt. Puccinia pulsatillae Trientalis americana Pursh Puccinia karelica Trifolium dubium Sibth. Uromyces minor Trifolium hybridum L. Uromyces nerviphilus U. trifolii var. hybridi Trifolium incarnatum L. Uromyces trifolii var. trifolii-repentis Trifolium medium L. Uromyces trifolii var. fallens Trifolium microdon H. & A. Uromyces minor Trifolium oliganthum Steud. Uromyces minor Trifolium pratense L. Uromyces trifolii var. fallens U. nerviphilus Trifolium repens L. Uromyces nerviphilus U. trifolii var. trifolii-repentis Triglochin maritima L. Puccinia aristidae Triodia flava (L.) Smyth Puccinia windsoriae Trisetum spicatum (L.) Ricker Puccinia monoica Triticum aestivum L. Puccinia glumarum P. graminis P. rubigo-vera var. tritici Triticum dicoccum Schrank. Puccinia graminis Triticum durum Desf. Puccinia graminis P. rubigo-vera var. tritici Triticum spelta L. Puccinia rubigo-vera var. tritici Tsuga canadensis (L.) Carr. Melampsora abietis-canadensis M. farlowii Pucciniastrum myrtilli Tsuga heterophylla (Raf.) Sarg. Uraecium holwayi Tsuga mertensiana (Bong.) Carr. Uraecium holwayi Tussilago farfara L. Puccinia poarum Urtica dioica L. Puccinia caricis var. urticata . Urtica gracilis Ait. Puccinia caricis var. urticata Urtica lyallii Wats. Puccinia caricis var. urticata Vaccinium corymbosum L. Pucciniastrum myrtilli Vaccinium myrtillus L. Pucciniastrum myrtilli P. goeppertianum Vaccinium oreophilum Rydb. Puccinisatrum goeppertianum Vaccinium parvifolium Smith Chrysomyxa ledi var. vaccinii Vaccinium pennsylvanicum Lam. Pucciniastrum myrtilli P. goeppertianum Vaccinium vitis-idaea L. Pucciniastrum goeppertianum Vaccinium spp. Pucciniastrum goeppertianum Valeriana septentrionalis Rydb. Puccinia commutata Valeriana sitchensis Bong. Puccinia commutata Veratrum californicum Durand Puccinia veratri Veratrum eschscholtzianum (R. & S.) Rydb. Puccinia veratri Veronica alpina L. var. unalaschcensis C. & S. (V. wormskjoldii R. & S.) Puccinia albulensis Viburnum cassinoides L. Coleosporium viburni Viburnum lentago L. Coleosporium viburni Viburnum pauciflorum Pylaie Puccinia linkii 50 Yicia americana Aluhl. Uromyces coloradensis var. campester U. coloradensis var. maritimus U. fabae Yicia angustifolia Reichard Uromyces fabae Yicia cracca L. Uromyces coloradensis var. campester U. fabae Yicia oregana Nutt. Uromyces coloradensis var. campester Vicia sativa L. Uromyces fabae Yicia sparsifolia Nutt. Uromyces coloradensis var. campester U. fabae Yinca major L. Puccinia vincae Yiola adunca Smith Puccinia violae Viola canadensis L. Puccinia violae P. ornatula Viola conspersa Reichenb. Puccinia viola Viola eriocarpa Schw. Puccinia violae Viola glabella Nutt. Puccinia ornatula Viola langsdorfii Fisch. Puccinia fergussoni Viola mackloskeyi Lloyd Puccinia fergussoni Viola nephrophylla Greene Puccinia ellisiana P. fergussoni P. violae Viola odorata L. Puccinia violae Viola orbiculata Geyer Puccinia canadensis Viola pedatifida G. Don. Puccinia violae Viola pubescens Ait. Puccinia violae Viola renifolia Gray Puccinia violae Violae rugulosa Greene Puccinia ornatula Viola septentrionalis Greene Puccinia violae Viola sororia Willd. Puccinia violae Violae tricolor L. Puccinia violae Viola spp. Puccinia ellisiana P. violae Waldsteinia fragarioides (Michx.) Tratt. Puccinia waldsteiniae Xanthium commune Britt. Puccinia xanthii Xanthium chinense Mill. Puccinia xanthii Zea mays L. Puccinia sorghi Zizia aurea (L.) Koch Puccinia angelicae Zizia cordata (Walt.) Koch Puccinia ziziae Zygadenus chloranthus Richards. Puccinia atropuncta Zygadenus elegans Pursh Puccinia grumosa Zygadenus gramineus Rydb. Uromyces zygadeni REFERENCES 1. Arthur, J. C. Manual of the rusts in United States and Canada. Lafayette, Purdue Research Foundation, 1934. 438 p. 2. Bisby, G. R., and others. The fungi of Manitoba and Saskatchewan. Ottawa, National Research Council, 1938. p. 62-73. 3. Canadian Plant Disease Survey, 11th report, 1931. Ottawa, Canada, Dept. of Agriculture, Experimental Farms Branch. 4. Same, 12th report, 1932. 13th report, 1933. 14th report, 1934. 16th report, 1936. 17th report, 1937. Ottawa, Canada, Dept. of Agriculture, Science Service. 5. Same 6. Same 7. Same 8. Same 9. Same U. Same 11. Same 12. Same 13. Same 14. Same 15. Same 16. Same 17. Same 18. Same 19. Same 20. Same 21. Same 22. Same 18th report, 1938. 19th report, 1939. 20th report, 1940. 21st report, 1941. 22nd report, 1942. 23rd report, 1943. 24th report, 1944. 25th report, 1945. 26th report, 1946. 27th report, 1947. 28th report, 1948. 29th report, 1949. 30th report, 1950. 31st report, 1951. 23. Check list of diseases of economic plants in Canada. Comp. by Ivan H. Crowell and E. Lavallee with the cooperation of the Common Names Committee, Canadian Phytopatho- logical Society and the Check List Committee, Quebec Society for the Protection of Plants, 1942. Ottawa, Canada, Dept. of Agriculture, Science Service, n.d. 68 p. 24. Drayton, F. L., Comp. A summary of the prevalence of plant diseases in the Dominion of Canada, 1920-1924. Ottawa, Canada, Dept. of Agriculture, Dominion Experimental Farms, Div. of Botany. 1926. 88 p. Bull. 71, n.s. 25. Fraser, W. P. and I. L. Conners. The Uredinales of the Prairie Provinces of Western Canada. Roy. Soc. Can. Trans. 3d series, v. 19, sect. 5. p. 279-308. 1925. 26. Moss, E. H. Rusts on Adoxa in Alberta. Mycologia 43:99-102. 1951. 27. Savile, D. B. O. North American species of Chrysomyxa. Can. J. Research, C, 28:318-330. 1950. 28. Savile, D. B. O. A new rust on Deschampsia. Mycologia 42:663-667. 1950. 29. Savile, D. B. O. The relationship of Puccinia praegracilis and P. connersii. Mycologia 43:456-458. 1951. 30. Savile, D. B. O. and I. L. Conners. The rusts of Armeria and Limonium in North America. Mycologia 43:186-195. 1951. 31. Wehmeyer, L. E. Contributions to a study of the fungous flora of Nova Scotia, I. p.242-243. Papers Mich. Acad. Sci. Arts and Letters. 20:233-266. 1934. Addendum 32. Faull, J. H. Two spruce-infecting rusts: Chrysomyxa Piperiana and Chrysomyxa Chiogenis. J. Arnold Arboretum 17:109-114. 1936. 33. Faull, J. H. Chrysomyxa Empetri — A spruce-infecting rust. J. Arnold Arboretum 18:141-148. 1937. 34. Savile, D. B. O. Taxonomy, phylogeny, host relationship and phytogeography of the micro- cyclic rusts of Saxifragaceae. Can. J. Botany 32:400-425. 1954. 35. Savile, D. B. O. Chrysomyxa in North America — additions and corrections. Can. J. Botany 33:487-496. 1955. 36. Ziller, W. G. Studies of western tree rusts. I. A new cone rust on Sitka spruce. Can. J. Botany 32:432-439. 1954. 37. Ziller, W." G. Studies of western tree rusts. II. Melampsora occidentalis and M. albertensis, two needle rusts of Douglas fir. Can. J. Botany 33:177-188. 1955. ;0LT0RE CANADA °"»" - c,073 00075407 AGRICULTURE EDMOND CLOUTIER, C.M.G., O.A., D.S.P. QUEEN'S PRINTER AND CONTROLLER OF STATIONERY OTTAWA, 1958