326 NORTH AMERICAN FLORA [VoLUME 7 
76. Dicaeoma Liatridis (Ellis & And.) Arthur & Fromme. 
Aecidium compositarum Liatri[dis] Webber, Bull. Neb. Exp. Sta. 1: 60: hyponym. 1889. 
Aecidium compositarum Liatridis Webber, Ann. Rep. Neb. Board Agr. 1889: 210. 1890, 
Aecidium Liairidis Ellis & And. Bot. Gaz. 16:47. 1891. 
Puccinia Liatridis Bethel; Arth. Mycologia 9: 301. 1917. 
O. Pycnia amphigenous, rather loosely arranged in discolored areas 1-5 mm. across, 
noticeable, yellowish or light chestnut-brown, globoid, 93-144 u broad; ostiolar filaments 
35-64 uw long. 
I. Aecia amphigenous, crowded, usually surrounding pycnia on yellowish or reddish 
spots 3-5 mm. in diameter, cupulate or short-cylindric, 0.2-0.3 mm. in diameter; peridium 
nearly colorless, the margin erose, recurved; peridial cells rhomboidal in longitudinal section, 
16-27 by 29-40 u, overlapping, the outer wall 5-10 u thick, transversely striate, nearly or quite 
smooth, the inner wall 2-4 » thick, finely verrucose; aeciospores globoid to ellipsoid, 16-24 
by 19-29 yu; wall colorless, thin, 1-1.5 uw, closely verrucose. ; 
On CARDUACEAE: 
ae punctata (Hook.) Kuntze (Liatris punctata Hook.), Colorado, Nebraska, North 
akota. 
Lacinaria scariosa (1,.) Hill (Liatris scariosa Willd.), Kansas, North Dakota, Wisconsin. 
Lacinaria spicata (1,.) Kuntze (Liatris spicata Willd.), Nebraska. 
Lacinaria squarrosa (1,.) Hill, Nebraska. 
II. Uredinia epiphyllous, scattered, intercostal, elliptic, 0.5 mm. long, early naked, 
pulverulent, orange-yellow; paraphyses none; urediniospores ellipsoid, 18-23 by 23-30 »; wall 
pale-yellow, or with a pale-brownish cast at maturity, moderately thin, 1.5-2 u, finely and 
rather closely echinulate, the pores scattered, about 6-8, usually indistinct. 
III. Telia hypophyllous, numerous, crowded, oblong, 0.5—1 mm. in length, blackish-brown, 
long covered by the epidermis, surrounded by hyphal stromata; teliospores irregularly oblong 
or clavate-oblong, 16-29 by 42-55 u, truncate or obtuse above, narrowed below, slightly or not 
constricted at septum; mesospores occasional; wall dark chestnut-brown, paler below, 1-2 u 
thick, moderately thickened above, 5-7 u; pedicel tinted, very short. 
ON POACEAE: 
Agrostis hyemalis (Walt.) B.S.P., New Mexico. 
Koeleria cristata (1.) Pers. (K. gracilis Pers.), Colorado, New Mexico, North Dakota, South 
Dakota, Wisconsin. 
TYPE LocaLiry: Anselmo, Nebraska, on Liairis scariosa. 
DISTRIBUTION: Northwestern Wisconsin to North Dakota, and southward to southern New 
Mexico on the plains and foothills. 
Exsiccati: Barth. Fungi Columb. 2603, 2902; Barth. N. Am. Ured. 1766, 2045; Brenckle, Fungi 
Dak. 82, 101, 401; Carleton, Ured. Am. 38; Sydow, Ured. 2318, 2347, 
77. Dicaeoma (?) Zeugitis (Arth. & Holway) Arthur & Fromme. 
Uredo Zeugitis Arth. & Holway; Arth. Am. Jour. Bot. 5: 538. 1918. 
Oand I. Pycnia and aecia unknown. 
II. Uredinia chiefly hypophyllous, scattered, elliptic, small, 0.3-0.5 mm. long, rather 
tardily naked, cinnamon-brown, ruptured epidermis evident; urediniospores broadly ellipsoid, 
19-21 by 23-26 y; wall cinnamon-brown, moderately thick, 1.5-2.5 y, finely and closely echin- 
ulate, the pores 3, sometimes 4, equatorial. 
III. Telia unknown. 
On PoackAE: : 
Senites Hartwegi (Fourn.) Arth. (Zeugites Hartwegi Fourn.), Guatemala. 
Type LocaLity: San Rafael, Department of Guatemala, Guatemala, on Zeugites Hariwegi. 
DIstRIBUTION: Known only from the type locality. 
78. Dicaeoma paradoxicum (Ricker) Arthur & Fromme. 
Puccinia paradoxica Ricker, Jour. Myc. 11: 114. 1905. 
O and I. Pyenia and aecia unknown. 
II. Uredinia not seen; urediniospores in telia globoid or broadly ellipsoid, 18-23 by 21- 
24 p»; wall brownish-yellow or light-yellow, thick, 2-2.5 », moderately and conspicuously echin- 
ulate, the pores 6—9, scattered. 
