278 BROOKLYN BOTANIC GARDEN MEMOIRS 
192. URoMYCcES JACKSONII Arth. & Fromme, Torreya 15: 260. I9I15. 
ON POACEAE: 
Agrostis Halli Vasey—Corvallis, Sept. 4, 1914, 1576. 
Agrostis maritima Lam.—Hood River Co., Aug. 26, 1915, E. 
Bartholomew, 5971 (Barth. Fungi Columb. 4992). 
Deschampsia caespitosa (L.) Beauv.—Toledo, Lincoln Co., July 
19, 1915, 3104. 
Deschampsia elongata (Hook.) Munro—Orenco, Washington Co., 
June 13, 1914, 2396; Corvallis, July 6, 1914, 2658, type, July 209, 
1914, 1438; Glendale, Douglass Co., Aug. 17, 1914, 1408. 
Hordeum jubatum L.—Umatilla, Umatilla Co., July 11, 1914, 1376. 
Hordeum nodosum L.—Portland, May 21, 1914, F. D. Bailey, 7583. 
In addition to the above collections this species is now recognized 
on Agrostis pallens from California and Muhlenbergia Lemmoni from 
Arizona and New Mexico. Collections have also been made on 
Deschampsia elongata in Washington and on Hordeum nodosum in 
Washington and California. 
193. Uromyces Junci (Desmaz.) L. Tul. Ann. Sci. Nat. IV, 2: 146. 
1854. 
Puccinia Junct Desmaz. Pl. Crypt. 81. 1825. 
Nigredo Junci Arth. N. Am. Flora 7: 238. 1912. 
ON CARDUACEAE: I. 
Arnica cordifolia Hook.—Austin, Grant Co., Aug. 1915, J. R. Weir, 
190. 
On JuncaAceAE: IJ, III. 
Juncus balticus Willd.—Redmond, Crook Co., July 2, 1914, 1426; 
Umatilla, Umatilla~Co., July 11, 1914, 7372; Toledo, Lincoln €or 
July 19, 1915, 3391. 
This species develops its aecia on various Carduaceae. In Europe 
cultures have been conducted by various authors, according to Klebahn 
(Die Wirtsw. Rostp. 329. 1904), showing that the aecia occur on 
Pulicaria dysenterica (Inula dysenterica). 
In America Arthur (Mycol. 4: 22. I912, 7:77. 1915) has shown 
by culture experiments that aecia occur on Carduus and Ambrosia. 
The aecia on Arnica are referred here on morphological grounds. 
194. UROMYCES JUNCI-EFFUSI Sydow, Monog. Ured. 2: 290. 1910. 
Puccinia Junci Schw. Trans. Am. Phil. Soc. II. 4: 295. 1832. 
(Not P. Junci Desmaz. 1825.) 
Uromyces effusus Arth. Jour. Myc. 13: 193. 1907. (Not U. 
effusus DeToni. 1888.) 
Nigredo Junci-effust Arth. N. Am. Flora 7: 239. 1912. 
