369 



1 1.1). Uromyces proeminens (DC.) Pass. nab. Fungi Eur. 1795. 1873. 

 Uredo proeminens DC. Fl. Fr. 2:235. 1805. 



Uromyces Euphorbiae C. & F.; Peck, Ann. Pvep. N. Y. State Mus. 

 25:90. 1873. 



Nigredo proeminens Arth. N. Am. Flora 7':259. 1912. 

 On Euphorbiaceae : 



Euphorbia maculata L., Newark, September 1905, (1633), 

 Lewes, Aug. 14, 1907, (1695), Selbyville, Oct. 4, 1907, (1980), 

 Euphorbia Preslii Guss., Newark, Sept. 14, 1907, III, (1630), 

 Seaford, .July 9, 1907, I, (1666) ; .July 9, 1907, II, III, (1655), 

 Selbyville, Oct. 4, 1907, (1994). 

 That this species is autoecious was first demonstrated by Arthur in 

 1899 (Bot. Gaz. 29:270. 1900) and later confirmed by the same author 

 (Jour. Myc. 8:51. 1902; Bot. Gaz. 35:12. 1903). The results, how- 

 ever, indicate that well marked biological forms are present. 



120. Uromyces Rhyncosporae Ellis, Jour. Myc. 7:274. 1893. 

 Nigredo Rhyncosporae Arth. Result Sci. Congr. Bot. Vienna 344. 



1906. 



On Cyperaceae: II, III. 



Rynchospora axillaris (Lam) Britton, Lewes, Aug. 14, 1907, 



(1687). 

 Rynchospora glomerata (L.) Vahl., Selbyville, Oct. 4, 1907, 

 (1801, 1811); Seaford, Nov. 15, 1907, (1768, 1769), April 23, 

 1908, (2031); Lewes, Nov. 16, 1907, (1856). 

 All cultures so far attempted with this species have yielded negative 

 results. It is very close morphologically to Uromyces perigynius which 

 has been shown to have aecia on Aster and Solidago. In spite of the 

 fact that attempts to infect these genera by Arthur (Mycol. 7:65. 1915) 

 we}'e unsuccessful, the writer is inclined to the view that it will ulti- 

 mately be shown that this species has its aecia on Aster and Solidaga. 



121. Uromyces Scirpi (Cast.) Burrill, Par. Fungi 111. 168. 1885. 

 Uredo Scirpi Cast. Cat. PI. Mars. 214. 1845. 



On Ammiaceae: I. 



Hydrocotyle Canbeyi C. & R., Lewes, Aug. 14, 1907, I, (1688), 

 June 6, 1908, (2090). 



24—11994 



