Preliminary List of Manitoba Fung. 99 
Calyptospora columnaris (Alb. and Schw.) Kuehn, III on Vaccinium sp., 
Minaki. 
Coleosporium Solidaginis (Schw.) Thuem., II on Solidago spp. 149, Swan 
River Valley, 476, 481; Ste. Rose du Lac, 1058; Lonely Lake, 1073; Victoria 
Beach, 1086; on Aster spp. 146, 1083, Grand Beach, 146; on cultivated asters, 
1187; on Doellingeria sp., Lonely Lake, 1056. -The mycelium of this rust 
overwinters in the perennial parts of the plants; aecia have not been found here. 
Cronartium Comandrae Peck, II, III on Comandra pallida, Victoria Beach; 
V. W. Jackson, 1090; common. 
Earlea speciosa (Fries) Arth., on Rosa spp., Brandon and Oak Lake, 
W. P. F.; Eden, 461; Morris, I. L. C., 127; common. 
Gymnoconia interstitialis (Schl.) Lagerh., I on Rubus triflorus, Ochre River, 
V. W. Jackson, 236; Eden, 452. This interesting rust (the longer cycle form) 
occurs commonly in northern regions. Germination of the aeciospores of the 
Eden collection showed that they produced germ tubes. 
Gymnosporangium cornutum (Pers.) Arth., I on Sorbus americana, Minaki, 
611. 
G. germinale (Schw.) Kern., I on Crataegus sp., 218. Not uncommon. 
G. juvenescens Kern., I on Amelanchier alnifolia, 75, 199, 247/J.; Eden, 458. 
Collected also at Brandon and Rapid City, I. L. C.; III on Juniperus hori- 
zontalis, Millwood, 497. Frequently found on Amelanchier. 
Melampsora Bigelowii Thuem., on Salix spp., Gilbert Plains, 1016; common 
throughout the Province; collected by V. W. Jackson along the Hudson Bay 
Railway, 241. ‘‘Overwinters in buds and twigs, the uredinia sometimes 
occurring on opening leaves in the spring.’’ W. P. F. 
M. Lini (Schm.) Desmaz., I, II, III on Linum usitatissimum, 229, 1129. 
II abundant on volunteer flax, collected as late as Oct. 8, 1920, 284. A rather 
serious disease of flax in Manitoba. II on Linum Lewisii, Russell, 1006; 
Baldur, I. L. C., 1147. 
Melampsorella elatina (Alb. and Schw.) Arth., I on Abies balsamea, Brandon, 
I. L. C.; II on Cerastium arvense, Brandon, W. P. F. 
Melampsoropsis Pyrolae (DC.) Arth., II, III on Pyrola rotundifolia, W. P. 
Fraser and V. W. Jackson, 251. 
Nyssopsora clavellosa (Berk.) Arth., III on Aralia nudicaulis, to81; Swan 
. River, 1079. 
Phragmidium americanum Diet., on Rosa sp. (cult.), 125; reported also from 
Brandon. This and the other Phragmidia on roses are referred with some 
doubt as to specific name. 
P. imitans Arth., on Rubus strigosus, Brandon, I. L. C., (III) 226/.; (IL) 227. 
P. montivagum Arth., on Rosa blanda, Virden, 222, Morris, I. L. C. Wild 
roses as far north as Swan River are abundantly affected with rust. Several 
collections are only in the aecial stage, and it is not certain to which species 
they belong. 
P. Potentillae (Pers.) P. Karst., I, II, II on Potentilla bipinnatifida, 
P. pennsylvanica, P. strigosa, P. glabrella, P. spp.; Virden, 130/.; Lake 
Clementi, I. L. C., 178, Reston, 437; Stony Mountain, 434; Millwood, 498; 
Swan River, 496. Common. 
Pileolaria Toxicodendri (Berk. and Rav.) Arth., III on Rhus Toxicodendron, 
77J.; Brandon, W. P. F. 
Polythelis Pulsatillae (Rostr.) Arth., on Pulsatilla ludoviciana, Virden, coll. 
P. R. Cowan, det. W. P. F. 
P. Thalictri (Chev.) Arth., III on Thalictrum venulosum, I. L. C., 1171F. 
Puccinia abundans (Peck) Jackson, I on Symphoricarpos sp., 214, 79; 
Russell, 1004; Rapid City, I. L. C. 
P. amphigena Dietel. Reported by W. P. F., I on Nemexia lasioneuron, 
Brandon; and II, III on Calamovilfa longifolia. 
P. Andropogonis Schw. (P. pustulata Arth.), I on Comandra pallida, 81. 
P. angustata Peck. Reported by W. P. F., lon Mentha canadensis, Brandon, 
Dauphin; and II, III on Scirpus microcarpus, Brandon. (See Mycol. x1, 130.) 
P. Antirrhini Diet. and Holw., II on Antirrhinum majus (cult.), greenhouse, 
M. A.C. J. F. Higham, Mar. 1920 (first report for Manitoba). During 1920, 
a 
