168 Illinois State Laboratory of Natural History. 
none; sori amphigenous, few, scattered, elliptical, usually re- 
maining partly covered by the epidermis; teleutospores sub- 
globose to oblong, apiculate, marked with longitudinal strie, 
15-21 by 20-80 u; pedicels fragile, deciduous. 
On leaves of Allium striatum: Union, April 12, 4028, L, 
TIL, April 15, 4108, 1., TIT., April 17, 4139, I., III.; Jackson, 
April 28, 4365. 
The only perceptible difference between the Illinois speci- 
mens and those on Erythronium from Europe is in the small 
number of ecidia in a cluster. 
U. junci, (Schw.) Tul. 
IL., II]. Sori amphigenous, scattered or sometimes con- 
fluent, roundish or elongated, prominent, long covered by the 
epidermis, and after the rupture of the latter its edges conspic- 
uous, the uredosori yellowish brown, the teleuto sori dark 
brown. Uredospores subglobose, elliptical or sometimes pyri- 
form, echinulate, 12-18 by 18-21 «, occasionally longer. Teleu- 
tospores clavate or irregularly elliptical, usually widest towards 
the top, smooth; apex obtuse, rounded or truncate, strongly 
thickened, deep. brown; base narrowed; pedicel somewhat col- 
ored, nearly or quite as long as the spore; 14-18 by 21-32 uv. 
On Jincus tenuis: Pulaski, May 1, 4404, II.; Stephenson, 
Sept. 13, 5830, IT., IIT. 
The teleutosori are often much infested with Darlucu 
Jil, a parasite on a parasite. On Juncus tenuis this seems 
especially true. 
U. scirpi, Burrill. 
IL, 11. Amphigenous, spots brown, indeterminate; sori 
long covered by the epidermis, minute and rounded, or larger, 
oblong, sometimes confluent end to end, forming clusters up 
to one fourth of an inch long, nearly black. Spores among 
the teleutospores few, irregularly elliptical, yellowish brown, 
sparsely echinulate, 15-20 by 27-36 yw. III. Spores clavate- 
elliptical, widest at centre, mostly pointed, brown, apex darker, 
and thickened, 18 by 32-42»; pedicel stout, subhyaline, about 
the length of the spore. 
