170 Illinois State Laboratory of Natural History. 
turned sidewise, beak-like; not seldom double; and occasionally 
suggesting the appendages at the apex of the teleutospores of 
Puccinia coronata. 
U. graminicola, Burrill. 
IL, II. Sori amphigenous, but more common on under 
surface, scattered, small, oblong or linear, soon uncovered, the 
ruptured epidermis ragged, but usually its remains plainly ap- 
parent. Uredosori yellow, teleutosori blackish brown; uredo- 
spores spheroidal or oval, minutely echinulate, 15-18 by 18-22 u. 
Teleutospores variable, subglobose, oval or oblong, smooth; 
apex rounded or angular, thickened, 12-18 by 21-30 »; pedicel , 
somewhat colored, thick, scarcely tapering below, once to twice 
the length of the spore. 
On Panicum virgatum: McLean, July 20, 2347, IL, H1., 
Oct. 11, 1832; Champaign, Aug. 13, 1036, IJ., III.; McHenry, 
Sept. 1, 1407. Elymus virginicus: Piatt, Aug. 10, 1001. 
This species resembles somewhat closely U. junci, (Schw.) 
Tul., from which, however, it is sufficiently distinct aside from 
the difference in host. Compared with the latter the present 
species has larger and sooner opened sori, the uredospores have 
finer echinulations, and the teleutospores are usually shorter, 
rounder, with apex less produced and pedicel very distinct, 
being thicker, longer, and less tapering below. Among the 
Uromycetes on grasses this seems distinct from U. Peckianus, 
Farlow, to which it bears some resemblance. The latter has 
the teleutospores more nearly subglobose, epispore uniformly 
thickened, not produced at apex, and with longer and differ- 
ent pedicels. Perhaps the nearest approach is to U. spartine, 
Farlow, which, however, has much larger and thicker-walled 
uredospores, and the teleutospores are lighter colored, more 
regular in shape, with longer and more slender pedicels. 
PUCCINIA, Pxrs. 
Teleutospores two-celled, one above the other, brown, pro- 
duced on permanent pedicels which arise in dense masses from 
a cushion-like layer of irregular cells beneath the epidermis. 
The characteristics of the genera Uronyces and Puccinia 
