232 Illinois State Laboratory of Natural History. 
On Helianthus: Hypophyllous, rarely also epiphyllous. 
Spots distinct or confluent, usually yellow, somewhat thick- 
ened; ecidia subcircinate, not usually densely crowded, short, 
not deeply immersed, deeply split and widely recurved, at first 
firm, but soon becoming pulverulent; spores subglobose or 
elliptical, epispore thin, minutely tuberculate; spermagonia few, 
central, mostly on upper side of leaf, inconspicuous, yellowish 
brown. On Helianthus sps.: Union, April 24, 4256, 4257, 
April 26, 4809; Jackson, April 28, 4869; Pulaski, May 9, 4578; 
Johnson, May 12, 4642, 4643, 4644, May 15, 4689. 
There seem to be two species on Helianthus, and in No. 
4644 on the same host. In one case the ecidia are in large 
clusters, with spores about 12-14 by 13-16 #; in the other case 
the clusters are small, and the spores measure about 15-21 by 
20-24 mu. 
On Bidens: Hypophyllous, very rarely also epiphyllous. 
Spots mostly rather large, effused, often confluent, purple, 
scarcely thickened; ecidia sparsely scattered, rather prominent, 
border abruptly and rather conspicuously recurved, firm; spores 
subglobose, epispore thin, minutely tuberculate, 15-17 »; 
spermagonia few and inconspicuous, mostly central, below, 
often altogether wanting. On Bidens frondosa: Adams, June 
27, 5804; Champaign, midsummer. 
On Lactuca: Hypophyllous. Spots definite, conspicuous, 
thickened, mostly widely separated, but sometimes numerous 
and somewhat confluent, purple, then brown; ecidia mostly 
crowded around a free central space, ‘rather numerous, short, 
many times irregularly split and widely recurved or pulveru- 
lent; spores angular, irregularly subglobose or broadly oval, 
epispore thin, minutely tuberculate, 15-18 »; spermagonia ra- 
ther numerous, scattered centrally above, large, simply convex, 
reddish brown. On Lactuca Canadensis: McLean, May 20, 
4720, May 28, 4748, 4759, May 25, 4781, 47814, May 26, 4798, 
May 29, 48038, May 30, 4826, May 31, 4849, 4865, June 1, 4884; 
Champaign, June 8, 4894. 
4&. plantaginis, Ces. 
Amphigenous. Spots usually small, sometimes effused and 
large; ecidia collected in little groups or loosely scattered, 
