Part 4, 1920] AECIDIACEAE 333 
II. Uredinia hypophyllous, scattered, often causing a brownish discoloration of the host, 
oval or oblong, small, 0.1-0.3 mm. long, early naked, pulverulent, yellow, ruptured epidermis 
rather inconspicuous; paraphyses few, hyphoid or wanting; urediniospores ellipsoid or globoid, 
13-21 by 19-25 u; wall pale-yellow or pale-brown, 1-2 » thick, moderately and rather finely 
echinulate, the pores scattered, 6~8. 
III. Telia epiphyllous, scattered or occasionally somewhat confluent, oval or oblong, 
small, 0.1-0.5 mm. long, long covered by the epidermis, compact, dark chocolate-brown, 
surrounded by a layer of dark-brown hyphal stromata; teliospores cylindric, oblong or clavate, 
13-23 by 35-55 u, usually truncate above, somewhat narrowed below, not constricted at septum; 
wall chestnut-brown above, paler below, thin, 1 « or less, thickened above, 3-5 », smooth; 
pedicel colorless or pale-brown, short, fragile. 
The species is doubtless composed of a number of races, and may possibly include distinct 
species, but insufficient study leaves the matter uncertain for the present. 
On PoaceakE: 
Agropyron Smithii Rydb. (A. occidentale Scribn.), Colorado, North Dakota. 
Agropyron tenerum Vasey, Colorado, Nebraska, North Dakota. 
Agropyron violaceum (Hornem.) Lange (A. biflorum Am. Auct.), Colorado. 
Elymus canadensis 1,., Kansas, Nebraska. 
Elymus glaucus Buckl. (E. americanus Vasey & Scribn.), California, Colorado, Oregon, 
Utah, Washington. 
Elymus virginicus L., Kansas. : 
Silanion Hystrix (Nutt.) J. G. Smith (S. brevifolium J. G. Smith, S. elymoides Raf., S. 
longifolium J. G. Smith), Colorado. 
ype LOCALITY: Cafion City, Colorado, on “Asprella Hysirix,” error for Sitenion H. ‘ystrix. 
a sa mae Minnesota to British Columbia, and southward to Missouri and southern 
alifornia. 
Exsiccatt: Barth. Fungi Columb. 3001, 3401, 4101, 4604, 4839; Barth. N. Am. Ured. 503, 
705, 902, 1103, 1302, 1661, 1802; Brenckle, Fungi Dak. 302, 343, 367a; Clements, Crypt. Form. 
Colo. 317; Ellis & Ev. Fungi Columb. 1859, 2102; Ellis & Ev. N. Am. Fungi 1832, 2218; Garrett, 
Fungi Utah 31, 35, 36, 77, 234; Sydow, Ured. 1544, 1800. 
88. Dicaeoma Clematidis (DC.) Arth. Résult. Sci. Congr. Bot. 
Vienne 344. 1906. 
Aecidium Clematitis DC. Fl. Fr. 2: 243. 1805, 
Aecidium Aquilegiae Pers. Ic. Pict. 58. 1806. 
‘Aecidium Clematitis Schw. Schr. Nat. Ges. Leipzig 1: 68. 1822. 
Aecidium Actaeae Opiz, Béheims Gewdchse 144, hyponym. 1823 
Cacoma vitalbatum Link, in Willd. Sp. PL. 67: 54. 1825. 
Caeoma (Aecidium) clematitatum Schw. Trans. Am. Phil. Soc. IT. 4: 293. 1832. 
Cacoma (Aecidium) cimicifugatum Schw. Trans. Am. Phil. Soc. IT. 4: 293. 1832. 
Aecidium (Caeoma) cimicifugatum Schw. ‘Tans. Am. Phil. Soc. II. 4: 309. 1832. 
Aecidium (Caeoma) clematitatum Schw. Trans. Am. Phil. Soc. II. 4: 309. 1832. 
Aecidium Actaeae Wallr. Fl. Crypt. Germ. 252. 1833. 
Uredo Elymi Westend. Bull. Acad. Brux. 18?: 405. 1851. 
Puccinia Elymi Westend. Bull. Acad. Brux. 18?: 408. 1851. 
Puccinia triarticulata Berk. & Curt, Proc. Am. Acad. 4: 126. 1862. 
Puccinia tomipara Trel. Trans. Wis. Acad. Sci. 6: 127. 1885. 
Puccinia perplexans Plowr. Quart. Jour. Micr. Sci. 25: 164. 1885. 
Rostrupia Elymi Lagerh. Jour. de Bot. 3:188. 1889. 
Rostrupia tomipara Lagerh. Jour. de Bot. 3: 189. 1889. 
Puccinia persistens Plowr. Brit. Ured. 180. 1889. 
Puccinia Agrostidis Plowr. Gard. Chron. III. 8: 139. 1890. 
Puccinia Agropyri Ellis & Ev. Jour. Myc. 7.131. 1892. 
Puccinia Aquilegiae Lagerh. Tromsd Mus. Aarsb. 17:47. 1895. 
Puccinia Clematidis Lagerh. Tromsé Mus. Aarsb. 17: 54. 1895. 
Puccinia adspersa Dietel & Holway, Erythea 3:81. 1895. 
Dicaeoma Agropyrum Kuntze, Rev. Gen. 3%: 467. 1898. 
Puccinia Actaeae-Agropyri Ed. Fisch. Ber. Schweiz. Bot. Ges. 11: 8. 1901. 
Puccinia Paniculariae Arth. Bull. Torrey Club 28: 663. 1901. 
Puccinia Triticorum Speg. Anal. Mus. Nac. Buenos Aires ITI. 1:65. 1902. 
Aecidium Delphinii Barth. Jour. Myc. 8: 173. 1902. 
Aecidium Batesionum Barth.; Ellis & Kv. Fungi Columb. 1901. 1904. 
‘Aecidium occidentale Arth. Bull. Torrey Club 31:7. 1904. 
Dicceoma Paniculariace Arth. Résult. Sci. Congr. Bot. Vienne 344. 1906. 
Puccinia cinerea Arth. Bull, Torrey Club 34: 583. 1907. 
