JACKSON: UREDINALES OF OREGON 281 
ON CYPERACEAE: 
Carex arthrostachya Olney—Corvallis, July, 1910, 7791, 1102. 
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 
Clone: Myce 10: 16. 1904; Mycol: 4:21. 1012, 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. Résult 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. 
Epilobu-tetragoni (cf. 99). 
202. UROMYCES POLYGONI (Pers.) Fuckel, Symb. Myc. 64. 1869. 
Puccinia Polygoni Pers. Neues Mag. Bot. 1: 119. 1794. 
Nigredo Polygoni Arth. Résult 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 1: 204. 1893. 
Uromycopsis porosa Arth. Résult Sci. Congr. Bot. Vienne 345. 
1906. 
On LEGUMINOSAE: 
Vicia americana Muhl.—Orenco, Washington Co., April 23, 1915, 
Rerron, (anes ste, Ti 9237. 
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. FI. Fr. 2: 235. 1805. 
