AMERICAN UREDIXE.E. igj 



Orig. Desc. " II. Sori epiphyllous, small, scattered, inconspicuous, mostly 

 covered by the epidermis: spores subglobose to elliptical; epispore 

 rather thick, warty: size 12-20X1?-- 



III. Sori epiphyllous, small, blackish, covered by the epidermis : 

 spores obovate to elliptical, broadly rounded or truncate at the apex 

 1 7-23 X -3-32//: epispore of nearly equal thickness throughout: pedicel 

 persistent, as long as the spore or shorter." 



On Alofecurus genicnlatus var. aristatns; Brainerd, Minn." 



II. Sori light brown, hypophvllous and to a less extent on 

 sheaths and culms, oblong or linear, scattered, inconspicuous, 

 tardily naked, ruptured epidermis prominent: uredospores 

 subglobose to elliptical-ovate, pale yellowish when desiccated. 

 18-26 Xi 5-- - : wall rather thick, closelv warty; pores minute, 

 several (6-8?), scattered. 



III. Sori hypophvllous extending to sheaths and culms, 

 irregularlv oblong, effused, varying to punctiform. covered 

 with the persistent epidermis, grayish black: teleutospores sub- 

 globose to sub-pyriform. light brown, smooth. 15-22 x 22-26 ": 

 wall thin: apex rounded or truncate, slightly if at all thickened: 

 base rounded or inclined to wedge-shaped: pedicel slender, 

 colored, usually shorter than the spore. 



A northern species, apparently not very common. The 

 gross appearance of the teleutosori is very similar to that of 

 the same sori of Puccinia rhamni. 



19. Uromyces gra.minicola Burr. (1SS4. Bot. Gaz. 9: 

 1S8.) 



19^. On Panicum virgatum L. Rockport, Kans., Bartholomew. 



19/'. On Panicum virgatum L. Decorah, Iowa, Holway. 



icjr. On Panicum virgatum L. Rockport, Kans., Bartholomew. 



Orig. Desc. "II and III. Sori amphigenous, but more common on 

 under surface, scattered, small, oblong or linear, soon uncovered, the 

 ruptured epidermis ragged, but usually its remains plainly apparent: 

 uredospores spheroidal or oval, minutely echinulate, 15-1SX 18-23 

 teleutospores variable, subglobose. oval or oblong, smooth, apex 

 rounded or angular, thickened, 12-1SX21-30W: pedicel somewhat colored, 

 thick, scarcely tapering below, once to twice the length of the spore.*" 



A quite common species, with prominent sori. when well 

 developed. The brown uredosori sometimes thicklv cover 

 one or both surfaces of the leaf, but are rarely confluent, or 



