I'di-iisitlr Ftiinii of Illinois. 20:', 



pointt'd. smooth. (lai-k-])ro\vii, IT) 22 by iJlMo ,u: pedicel iisuiill.v 

 iihout the h'ligth of the s])ore. soiuetinies h))im-er. more or less 

 tinted. 



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

 linear, abbreviated. Spores fuscous. Although not contluent, yet oc- 

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

 eulms and sheaths of various species of AiKlropof/ot). — Schweinitz, N. 

 Am. Fung., Xo. 8911, p. 20r,. 



On Aitdropof/on fiircdliin: lioone. Sept. 2. 142o; Oj^le, Sept. 

 2(). ()1S4, II.. HI.: Rock Island, Sept. 27, 1()78. A. scojyanns: 

 Oj^le, Sept. 25. 0172, TI.. TIT.. Sept. 2(\ 6200. II.. ITI.: Fnioii. 

 Oct. 22, 1U()(). 



In Thiimen's Mycotheca Universalis, No. 1880, the speci- 

 mens named Piireiiiia EUisiana. Thiim.. which Farlow identi- 

 ties ( Proceed. Am. Acad. Arts & Sc, July. 1888, p. 81) as F. 

 <ni'/roj)0(/i, Schw., the telentospores are often more narrow and 

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

 the Illinois specimens. 



In the specimens examined the uredospores vary consider- 

 ably, even on the same leaf, as well as upon different hosts. 



P. maydis, Carradori. 



II.. III. Amphigenous. Sori subcircular to ol)long. irreg- 

 ularly scattered, often confluent, rather tardily rupturing the 

 epidermis, whose upturned edges persistently remain: uredo- 

 spores subglobose. epispore rather thick, echinulate, 25-80 a. 

 Telentospores broadly elliptical, considerably constricted at the 

 septum, ends mostly obtusely rounded, but sometimes thick- 

 ened at the apex and variously pointed, smooth. 15-22 by :-JO-45 

 u: ])edicel slightly colored, once to twice the length of the spore. 



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

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

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

 lines long and broad. ^lany of the sori occur on the nerves of the 

 leaves. Spores black, large; ])edicels short. —Schweinitz, N.Am. Fung., 

 No. 2910, p. 295. 



On leaves of Zm Mat/s: McLean. July 20, 2:^45. 1 1.. HI.. 

 Aug. 4, 2;U4. II.. III., Aug. 19, 5036, TI./tH.. Sept. 0, 5664, 

 Oct. 1], 1830: Champaign. Aug. 13. 1032. IT.: McHenry, Aug. 



