JACKSON: UREDINALES OF OREGON 281 



On Cyperaceae: 



Carex arthrostachya Olney — Corvallis, July, 1910, 1191, 1192. 



This species is morphologically indistinguishable from P. Asterum 

 (cf. 69) in all spore stages except in the possession of one-celled telio- 

 spores. Like that species the aecia occur on Aster and Solidago. The 

 genetic connection was established by Arthur in repeated experiments 

 (Jour. Myc. 10: 16. 1904; Mycol. 4: 21. 1912,7:75. 1915,7:83. 

 1915). Fraser (Mycol. 4: 181. 1912) has confirmed Arthur's results 

 in part. 



The above collection is the only one so far known from the Pacific 

 coast. 



201. Uromyces plumbarius Peck, Bot. Gaz. 4: 127. 1906. 

 Nigredo plumbaria Arth. Result Sci. Congr. Bot. Vienne 344. 



1906. 

 On Onagraceae: 



Pachylophus marginatus (Nutt.) Rydb. — Snake River, E. Oregon, 

 June 3, 1901, W. C. Cusick (Phan. spec. 2542). 



Pachylophus montanus (Nutt.) A. Nels.^ — Crooked River, Crook 

 Co., July 3, 1901, W. C. Cusick (Phan. spec. 2633). 



This species is correlated in morphological characters with P. 

 Epilohii-tetragoni (cf. 99). 



202. Uromyces Polygoni (Pers.) Fuckel, Symb. Myc. 64. 1869. 

 Puccinia Polygoni Pers. Neues Mag. Bot. i: 119. 1794. 

 Nigredo' Polygoni Arth. Result Sci. Congr. Bot. Vienne 344. 1906. 



On Polygonaceae : 



Polygonum aviculare L. — Corvallis, Sept. 4, 1914, 1929; Clatskanie, 

 Columbia Co., Oct. 6, 1914, F. D. Bailey, 1945; Medford, Jackson 

 Co., June 20, 1915, G. B. Posey, 3055. 



203. Uromyces porosus (Peck) comb. nov. 

 Aecidium porosum Peck, Bot. Gaz. 3: 37. 1878. 

 Uromyces coloradensis Ellis & Ev. Erythea i : 204. 1893. 

 Uromycopsis porosa Arth. Result Sci. Congr. Bot. Vienne 345. 



1906. 

 On Leguminosae: 



Vicia americana Muhl. — Orenco, Washington Co., April 23, 1915, 

 I, 1161, June 13, 1914, III, 3237. 



The two collections were made at the same spot on different dates. 

 The first consists of aecia only and the second of telia only. 



204. Uromyces proeminens (DC.) Pass.; Rabh. Fungi Eur. 1795. 



1873. 

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



