AMERICAN UREDIXE.E. 380 



on Lofihantluis ncpetoides, since referred to P. glechomalis 

 DC, according to Sydovv (Saccardo, Sylloge fung.. 12: 643). 

 Before the publication of Dietel's name an herbarium name, 

 P. vilfce, had been adopted by Ellis and Tracy, and speci- 

 mens distributed under it. but no description was published. 

 As the publication of Zopf's species (with full description) 

 invalidates Dietel's name, we substitute the name of P. vilfce, 

 the appropriateness of which has already been recognized. 



A specimen in the herbarium of the U. S. Division of Veg. 

 Phvs. and Path, at Washington, D. C, collected by S. M. 

 Tracy in Mississippi on S. asperifolius belongs to this species. 



EXSIC. 

 Ellis and Everhart. N. A. F. 2417,3570. 

 Ellis and Everhart, Fungi Columb, 48, 11S9. 

 Sydow, Ured. 1032. 

 Seymour and Earle, Econ. Fungi Supp. B 19. 



27. Puccinia stip^; Arih. (1884. Bull. Iowa Agric. Coll. 

 160.) 



2-jn. On Stipa spartea Trin. Decorah. Iowa. Holway. 

 27A. On Stipa spartea Trin. Spirit Lake, Iowa, Arthur. 

 27c. On Stipa spartea Trin. Spirit Lake, Iowa, Arthur. 



Orig. Desc. "II. Sori oblong, small, mostly on the upper surface of the 

 leaf, yellowish, inconspicuous, tardily naked; uredospores yellow, 

 round to oblong or ovate, minutely roughened and with or without 

 very fine points, 15 to 20 mnim. broad by 20 to 30 mmm. long. 



III. Sori oblong, scattered over the upper surface of the leaf, very 

 dark brown, soon naked; encircling epidermis inconspicuous; teleuto- 

 sporesoblong or less commonly oblong-obovate. smooth, brown, consid- 

 erably constricted at the middle, iS to 25 mmm. broad by 42 to 56 

 mmm. long; apex thickened, or sometimes thin, rounded to obtuse, 

 sometimes acutish; base obtuse or somewhat narrowed; pedicel 

 slightly colored, two to three times as long as the spore." 



Usually a very abundant species on the prairies of the 

 Northwest. The uredospores are evenlv warty, sometimes 

 weakly echinulate, and have six to eight irregularly distrib- 

 uted pores. 



The same species occurs on Stipa comata T. & R. in Mon- 

 tana {Anderson No. 158, and Seymour) and North Dakota 



