282 BROOKLYN BOTANIC GARDEN MEMOIRS 
Nigredo proeminens Arth. N. Am. Flora 7: 259. 1912. 
ON EUPHORBIACEAE: 
Euphorbia glyptosperma Engelm.—Wasco Co., July 23, 1885, W. 
N. Suksdorf (from Phan. spec. in N. Y. Bot. Gard.). 
Euphorbia oregonensis Millsp.—Horse Creek Canyon, Wallowa 
Co., May 20, 1897, E. P. Sheldon, S715. 
205. UROMYCES PUNCTATUS Schrét. Abh. Schles. Ges. 48: 10. 1870. 
Nigredo punctata Arth. N. Am. Flora 7: 253. 1912. 
ON LEGUMINOSAE: 
Astragalus Purshit Dougl.—Austin, Grant Co., Aug. 1915, J. R. 
Welr, 236. 
The aecia of this species have been shown by European authors 
to occur on Euphorbia cyparissias. No aecial collections have been 
made in America. 
206. UROMYCES ScirPiI (Cast.) Burrill, Bot. Gaz. 9: 188. 1884. 
Uredo Scirpi Cast. Cat. Pl. Mars. 214. 1845. 
Nigredo Scirpt Arth. Résult Sci. Congr. Bot. Vienne 344. 1906. 
ON CYPERACEAE: 
Scirpus paludosus A. Nels.—Waldport, Lincoln Co., Aug. 23, 
1915, F. D. Bailey, 3323. 
This species was first shown by Dietel (Hedwigia 29: 149. 1890) 
to have its aecia on Sium latifolium and Hippurus vulgaris. Other 
investigators have added other Umbelliferous hosts to the list. 
In ‘America Arthur (jour: Myc. 13: 199: “1907; “14: 17. 4908; 
Mycol. 1: 237. 1909) has shown that Cicuta maculata is an aecial 
host. Fraser (Mycol. 4: 178. 1912) has confirmed Arthur’s work. 
Aecia on other hosts are properly referred here on morphological 
grounds. The species can doubtless be separated into a number of 
biological forms when more extensive culture work has been conducted. 
207. UROMYCES SILPHII (Burrill) Arth. Jour. Myc. 13: 202. 1907. 
Aecidium compositarum Silphit Burrill; DeToni in Sacc. Syll. 
Fung. 7: 798. 1888. 
Uromyces Junci-tenuis Sydow, Monog. Ured. 2: 289. IgI0. 
Nigredo Silphi Arth. N. Am. Flora 7: 239. 1912. 
ON JUNCACEAE: 
Juncus occidentalis (Cov.) Wieg.—Corvallis, Aug. 10, I911, 1187, 
June 24, 1914, F. D. Bailey, 1387, July 29, 1914, 1445; Philomath, 
Jan. 6, 1914, 1108, May 10, 1914, 3393; Hood River, July 24, 1915, 
3392. 
Arthur (Jour. Myc. 13: 202. 1907; 14:17. 1908) has shown that 
this common species has its aecia on Silphium. Using telial material 
on J. tenuis from Indiana, West Virginia and Nebraska, five successful 
