AMERICAN UREDINEvE. 321 



SYN: 



1883, July. Uromyces sfiartince Farl. Proc. Amer. Acad. 

 Sci. 18:77. 



O, I. Spermogonia and aecidia unknown. 



II, III. Sori epiphyllous, between the nerves, linear, soon 

 naked, ruptured epidermis conspicuous. II. Uredosori yel- 

 lowish, inconspicuous; uredospores globose or broadly ellip- 

 tical, large, 22-35/u, in diameter, average 30//, wall golden 

 yellow, thick while immature, becoming thin, echinulate with 

 low stout points, pores 5 to 8, scattered. III. Teleutosori 

 blackish-brown, sunken between the nerves or protruding; 

 teleutospores dark brown, obovate or oblong-clavate, 15-22 

 by 25-40//,, apex darker, acuminate or obtuse, or with two or 

 more projections, much thickened, 8-1 2/x, base narrowed, 

 pedicel colored, firm, once to thrice length of the spore, often 

 shorter. 



EXSIC: 

 Rabenhorst-Winter, Fungi Europaei, 3623. 

 Sydow, Ured., 251. 

 Ellis, N. Amer. Fungi, 239, 1443. 

 Seymour and Earle, Econ. Fungi, 67, 68, 546. 



This species is very abundant in the upper Mississippi val- 

 ley, but is also found throughout the northern United States 

 and Canada. It is unusually variable in both sori and spores, 

 and until recently (see Bot. Gaz. 34:3) has been separated 

 into two species, the larger form, well represented by the ac- 

 companying 52^, being called Urom. spartincs, and best 

 shown in sea coast collections. The differences, however, 

 appear to be of an ecological character, and scarcely worthy 

 of taxonomic recognition. 



53. Puccinia seymouriana Arth. (1902. Bot. Gaz. 34 : 1 1.) 



53a. On Spartina cynosuroides (X.) Willd., ii. Ill, Racine, Wis., Davis. 

 536. On Spartina cynosuroides (L.) Willd., Ill, Racine, Wis., Davis. 



Orig. Descr. " Sori epiphyllous, intercostal, prominent, oblong, ruptured 

 epidermis inconspicuous. II. Uredospores globose, or broadly ellip- 



