JACKSON: UREDINALES OF OREGON 283 



infections of Silphium perjoliatum 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. 



Briim. 10: 163. 1872. 

 Caeoma Solidaginis Sommerf. Suppl. Fl. Lapp. 234. 1826. 

 Telospora Solidaginis Arth. Result 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. i : 36. 1884. 

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



1906. 

 On Portulaceae: 



Calyptridium roseum Wats.? — Crater Lake, Klamath Co., 7,000 ft., 

 Sept. 22, 1913, E. P. Meinecke, CrPkD (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 suhstriata Arth. N. Am. Flora 7: 253. 1912. 



On Leguminosae: 



Lupinus sp. — Austin, (jrant Co., Aug. 191 5, J. R. Weir, 750. 



211. Uromyces Trifolii (Hedw. f.) Lev. Ann. Sci. Nat. HI, 8: 371. 



1847. 



Puccinia Trifolii Hedw. f.; DC. Fl. Fr. 2: 225. 1805. 



Nigredo Trifolii Arth. Result Sci. Congr. Bot. Vienne 344. 1906. 

 On Leguminosae: 



Trifolium hyhridum L. — Corvallis, Aug. 1909, 30Q2; Hood River 

 Co., May 14, 1914, 3ogi, Aug. 5, 1914, 3og5; 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, 217. 



