JACKSON: UREDINALES OF OREGON 283 
infections of Silphium perfoliatum were obtained, all of which resulted 
in the development of pycnia and aecia. The aecia on Silphium have 
been collected, so far as known to the writer, only in the Mississippi 
Valley from Ohio to Wisconsin, Kansas and Missouri, on three species 
of Silphium. The range of the telial collections referred here, how- 
ever, is much greater including nearly the entire United States and 
Canada except the south Pacific slope. It seems probable that some 
plants other than Silphium, at present unrecognized, also serve as 
aecial hosts for this species. 
208. UROMYCES SOLIDAGINIS (Sommf.) Niessl, Verh. Natur.-Ver. 
Brum: 10: 163. 1872: 
Caeoma Solidaginis Sommerf. Suppl. Fl. Lapp. 234. 1826. 
Telospora Solidaginis Arth. Résult Sci. Congr. Bot. Vienne 346. 
1906. 
ON CARDUACEAE: 
Solidago sp.—Dufur, Wasco Co., June 30, 1914, 1336. 
This is the only micro-Uromyces occurring in both Europe and 
America. This species shows a morphological correlation with P. 
Asteris (cf. 70). 
209. UROMYCES SPRAGUEAE Hark. Bull. Calif. Acad. Sci. 1:36. 1884. 
Uromycopsis Spragueae Arth. Résult Sci. Congr. Bot. Vienne 345. 
1906. 
ON PORTULACEAE: 
Calyptridium roseum Wats.?—Crater Lake, Klamath Co., 7,000 ft., 
Sept. 22, 1913, E. P. Meinecke, CrPRD (2) 11. 
Spraguea multiceps Howell—Strawberry Mt., Grant Co., Sept. 2, 
1913, W. E. Lawrence, 1177. 
210. UROMYCES SUBSTRIATUS Sydow, Ann. Myc. 4: 30. 1906. 
Nigredo substriata Arth. N. Am. Flora 7: 253. I9g12. 
On LEGUMINOSAE: 
Lupinus sp.—Austin, Grant Co., Aug. 1915, J. R. Weir, 150. 
211. Uromyces TriroLi (Hedw. f.) Lev. Ann. Sci. Nat. III, 8: 371. 
1847. 
Puma Trfolu Wedw.t.; DC. Fl. Fr. 2: 225. 1805. 
Nigredo Trifolit Arth. Result Sci. Congr. Bot. Vienne 344. 1906. 
ON LEGUMINOSAE: 
Trifolium hybridum L.—Corvallis, Aug. 1909, 3092; Hood River 
Co., May 14, 1914, 3o9r, Aug. 5, 1914, 3095; Portland, June 11, 
1914, 3233; Springbrook, Yamhill Co., June 22, 1914, G. B. Posey, 
3103; Garden Home, Multnomah Co., July 15, 1914, F. D. Bailey, 
1508; Grant’s Pass, Josephine Co., Sept. 3, 1916, J. R. Weir, 277. 
