200 Illinois State Laboratory of Natural History. 
McHenry, Aug. 22, 1224. Oats:— Rye: LaSalle, June 19, 
5225, 11, UI. Elymus Virginicus: Champaign, Aug. 11, 1022; 
McHenry, Aug. 24, 1276; Ogle, Sept. 25, 6155, IL, IIT. 
This name is founded upon. the recognition at the uredo- 
form as Uredo r ubigo-vera, DC. (Flore Frane. VI. [1815] p. 83), 
which to say the least is doubtful. The same name has been 
used for the uredoform of Puccinia coronata, and of Puccinia 
graminis, found on the same host species, and doubtless equally 
included by DeCandolle in his supposed species. Winter 
(Die Pilze, p. 217) probably had good reasons for accepting 
the name as here given, but should: for any reason, hotanists 
decline to follow him in this, then Puccinia str icefor mis, Westd. 
(Bull. de 1’ Acad. Belg. [1853] XXI.), rather than Puceiniu 
straminis, Fuckel (Enumer. Fung. in Jahr. Ver. f. Natur v. 
Nassau [1861, etc.]), should be adopted, though the latter rec- 
ognizes DeCandolle’s Uredo rubigo-vera as the early stage of 
the teleutoform named by him. Certain it is that P. coronata 
and P. rubigo-vera are very closely allied. 
P. coronata, Corda. 
IL, III. Amphigenous. Uredospores subglobose, echinu- 
late, 18-21 by 21-24 »; teleutosori small, oblong or linear, 
slightly raised, surrounded by a dense row of paraphyses, long 
covered by the epidermis; teleutospores cuneate, scarcely con- 
stricted at the septum, more or less truncate above, crowned 
with one to several conspicuous, obtuse, horn-like projections, 
epispore thin, smooth, cell contents granular, 15-18 by 45-55 4; 
pedicel short, less than half the length of the spore, rather 
fragile. 
Sori linear, short, minute, obscurely fuscous, covered by the palles- 
cent epidermis; spores subsessile, subclavate, crowned at the apex with 
acute, stellate, radiate, flame-yellow teeth, yellow below. Length of 
spore .00175 in.—Corda, Icon. I, p. 6. 
On leaves and sheaths of oats: Adams, June 30, 5360, IT., 
UL, July 10, 5456, 0., O1., July 11, 5502, IL, M.; MeLean, 
July 11, 2334, Sept. 6, 5665, IL., IT].: Tazewell, July 22, 2330 
and 2331; McHenry, Aug. 20, 1144. Wheat: Fulton, Oct. 1, 
1767, IL., II. 
