/7/r Fungi of Ill-wot*. 1 ( . ( .) 



the length of the spore, rather slender but firm-, slightly tinted. 

 On Spurt ina cynosuroides: McLean, July 20, 2348, Oct. 11, 

 1829: Lake, Aug. 27, 1346; Fulton, Oct. 1, 1771. I'Jirtit/mifrx 

 conuHtnnx: McHenry, Aug. 26, 1325: Kane, Aug. 30, 1368. 

 Andropogon furcatus : Rock Island, Sept. 24, 1648. A. scopa- 

 ////x: JoDaviess, Sept. 15, 5920. 



This species was first described as Uredo Phwiyniitis by 

 Schumacher (Enum. Plant. Saell. II. [1803] p. 231), and his 

 description shows that his Uredo was that of this species, if, 

 indeed, he had not the teleutoform. Hedwig next described it 

 as Pnccinia arundinacea, which description was published by 

 DeCandolle, together with one of his own, in Lam. Encyc. bot. 

 (1806) p. 250; it is thus explained why DC. is sometimes writ- 

 ten as authority for this name instead of Hedw. Schwein- 

 itz (Syn. Fung. Car. [1822] No. 487) published it under the 

 name of Pnccinia arundinaria*. 



The Illinois specimens on Phragmites rommunis have te- 

 leutospores narrower and more constricted, so that the segments 

 are each nearly elliptical, while the European specimens on 

 same host (Rabh. Herb. Mycol. 282) are much like the Illinois 

 specimens on Spartina cynosuroides and on Andropogan. But 

 the spores on one Spartina plant closely resembles the Illinois 

 phragmites form. 



P. rubigo-vera, (DC.) Winter. 



II., III. Amphigenous. Uredosori mostly hypogenous. 

 linear or oblong, irregularly scattered, seldom confluent, some- 

 what elevatedfsoon open; teleutosori linear or oblong, scattered 

 or variously confluent, long covered by the unbroken epidermis, 

 black, surrounded by a dense row of dark-brown paraphyscs: 

 uredospores subglobose, epispore rather thin, minutely echinu- 

 late, 21-25 ^; teleutospores cuneiform, oblong or elliptical, 

 constricted or not at the septum, but usually tapering below, 

 vertex thickened, truncate, obtusely rounded or sometimes more 

 or less pointed, epispore thin, smooth, cell contents granular, 

 12-18 by 27-54 /t; pedicel short, rarely half the length of tin* 

 spore, deeply tinted. 



On irJieut: Adams, June 26, 5294. June 29, 5344, July 6. 

 5426, II., III.; McLean, July 11, 2343, July 17. 55S3. II.. III.: 

 15 



