Pdnif^ific Finii/i of Il/iiiois. 20R 



pointed, smooth, dark-brown, 15-22 by 80-45 ^: pedicel usually 

 about the length of the spore, sometimes longer, more or less 

 tinted. 



Spots obliterated, sori densely aggregated, elevated, fuscous, obtuse, 

 linear, abbreviated. Spores fuscous. Although not confluent, \'et oc- 

 cupying almost the entire leaf. Very frequent in autumn in leaves, 

 i-ulms and sheaths of variou.s s^^ecies of Audropofjon. — Schweinitz, N. 

 Am. Fung., Xo. 2911, p. 295. 



On AndrojMf/on fiircdfiis : Boone. Sept. 2. 1428: Ogle, Sept. 

 2n. f)lS4, IT.. III.: Rock Island. Sept. 27, HM8. A. sropariifs: 

 Ogle, Sept. 25. ()172. IT.. TIT.. Sept. 2(1 6200. IT.. ITT.: Union. 

 Oct. 22. VMl 



In Thiimen's Mycotheca Universalis. No. 183(5. the speci- 

 mens named Piirciii/a EUis'uaia, Thiim.. wliich Farlow identi- 

 ties (Proceed. Am. Acad. Arts & Sc, July, 1888, p. SI) as P. 

 i/iii/)-oj)0(/i. Schw.. the teleutospores are often more narrow and 

 ])ointed. are lighter in color, and the pedicels are longer than in 

 the Illinois specimens. 



Tn the specimens examined the uredospores vary consider- 

 ably, even on the same leaf, as well as u])on different hosts. 



P. maydis, Carradori. 



IT.. TIL Amphigenous. Sori subcircular to oblong, irreg- 

 ularly scattered, often confluent, rather tardily rupturing the 

 epidermis, whose upturned edges persistently remain: uredo- 

 spores subglobose. epispore rather thick, echinnlate, 25-80 fi-. 

 Teleutospores broadly elliptical, considerably constricted at the 

 septum, ends mostly obtusely rounded, but sometimes thick- 

 ened at the a{)ex and variously pointed, smooth. 15-22 by 80-45 

 fi: pedicel slightly colored, once to twice the length of the spore. 



P. sorghi, Schw. Spots none ; sori broad, of diflferent forms, vari- 

 ously lobed, at tirst covered by the epidermis, then denudated but sur- 

 rounded by the lacerated epidermis, often also internally fissured, 2-4 

 lines long and broad, ^lanj' of the sori occur on the nerves of the 

 leaves. Spores black, large ; pedicels short. — Schweinitz, N. Am. Fung., 

 No. 2910, p. 295. 



On leaves of Zra Maijs: McLean. July 20, 2845. IT.. TIL. 

 Aug. 4, 2844, II.. TIL, Aug. 19, 5636, II., III., Sept. 6, 5664, 

 Oct. 11, 1830; Champaign. Aug. 13, 1032, II.; McHenry, Aug. 



