}\n-(/sific FitiH/i 0/ Illinois. \%) 



the leiiii'th of the spore, rather slender hut firm, slightly tinted. 

 On Spurt ilia ci/nosifnndes: McLean. July 20. 2848. Oct. 11. 

 1829; Lake, Aug. 27, 1846; Fulton, Oct. 1. 1771. Phragmifes 

 roiiniiiiiiis: McHenry, Aug. 26, 1825: Kane, Aug. 80, 1868. 

 An(h-oj)0(jon fiircdfiis: R(>ck Island, Sept. 24. 1648. A. seopa- 

 riiis: JoDaviess, Sept. 15, 5^)20. 



This species was first described as Uredo Phragiiiitis by 

 Schumacher (Enum. Plant. Saell. TL [1808] p. 231), and liis 

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

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

 as Pi(ccinia arirndiiidced, which description was published bv 

 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 Piiccinia annidiiiaria'. 



The Illinois specimens on PJiray mites roiinuiinis 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 ri/nosiiroides and on Andropoijoii. But 

 the spores on one Sjxfrtiiid plant closely resembles the Illinois 

 pJirdf/iuitf's form. 



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



II., III. Amphigenous. Uredosori mostly hypogenous, 

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

 what elevated, soon open; teleutosori linear or oblong, scattered 

 or variously confluent, long covered by the unbroken epidermis, 

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

 uredospores subglobose, e])ispore rather thin, minutely echinu- 

 late. 21-25 i^: 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 /*; pedicel short, rarely half the length of the 

 spore, deeply tinted. 



On irJietit: Adams, June 26, 5294. June 29, 5844, July 6. 

 5426, II., III.; McLean, July 11, 2848, July 17, 5588, II., III.; 

 15 



