li)8 Illinois Stair Lahonilonj of Sohinil llisfori/. 



times roiiiult'd. iiiirrowed below to the pedicel, smooth, chest- 

 iiut-l)row]i, IT) 21 by 8()-l)() /t; pedicel firin, colored, ;il)out the 

 length of the spore, sometimes shorter. 



Sori, dense, linear, bluckisb, spores subturbinate, constricted in tbt; 

 middle. — Persoon, Syn. Fung., p. 228, 



On culms, sheaths and leaves of cereals and grasses. On 

 irJfrat: McLean, July 11,2885 and 2848, July 12, 2841, .luly 

 15, 2881); Tazewell, July 22, 2840; Piatt, Aug. 17, 1184; Mc- 

 Henry, Aug. 20, 1145, Aug. 22, 1224; Fulton, Oct. 1, 1778. 

 ()(ffs: McLean, July 11, 2884, July 12, 2882 and 2888; Taze- 

 well, July 22, 2829, 2880 and 2881; Champaign, Aug. 18, 102U 

 and 1088; Piatt, Aug. 15, 1068: McHenry, Aug. 20, 1144, Aug. 

 26, 1828; Fulton, Oct. 1, 1774. Agrostis vulgaris: McHenry. 

 Aug. 24, 1275, Aug. 26, 1824; LaSalle, Sept.' 18, 1521; JoDa- 

 viess, Sept. 18, 5987; Rock Lsland, Sept. 27, 1678; Fulton, Oct. 

 8,1782; McLean, Oct. 4, 1760; Union, Oct. 21,1905. Hor- 

 (h'liin jiihatum: McLean, July 11, 284(), July 17. 5580, XL, TIL; 

 July 19, 5593, IL, ITL; McHenry, Aug. 28, 1281, Aug. 25, 

 1807, Aug. 2(), 181(), Aug. 81, 1892; Rock Island, Sept. 26, 1661. 



As here identified a variable species, though some forms 

 often formerly included are specifically separated under the 

 names P. einaciilata. P. irindsoria\ and P. andropogi. The 

 description is made from specimens on wheat. On Agrostis 

 the teleutos])ores are sometimes nearly typical (No. 1782), in 

 other cases they vary much in shape and thickness ofthe epis- 

 pore — shorter, rounder and thinner for the most part on Nos. 

 1275, 1608, and especially 1905. The uredo is very character- 

 istic in all. 



P. phragmites, (Schum. ) Kornicke. 



IL, III. Am})higenous. Sori scattered, very prominent, 

 mostly rather large, elliptical, somewhat powdery, soon naked, 

 the remains of the ruptured epidermis not usually visible; ure- 

 dospores elliptical, epispore very thick, strongly tuberculate, 

 without paraphyses, 18-21 by 27-82 m; teleutospores elliptical 

 or oblong, somewhat but not abruptly constricted, vertex a lit- 

 tle thickened and rounded or (jbtusely pointed, smooth, pale 

 brown. 18-22 by 87-60 .a; pedicel very long, three to four times 



