Part 4, 1920] AECIDIACEAE 298 
On Poaceag: 
Echinochloa Crus-galli (L,.) Beauv. (Panicum Crus-galli L.), Illinois, Kansas, Missouri, 
Nebraska, New Mexico, Oklahoma. 
Echinochloa holciformis (H.B.K.) Chase (Panicum holciforme Steud.), Hidalgo. 
Echinochloa zelayensis (H.B.K.) Schuites, Michoacan. 
Echinochloa sp., Jalisco. 
TYPE LocaLity: Peradeniya, Ceylon, on Panicum sp. 
DISTRIBUTION: Illinois and Nebraska to south-central Mexico; also in South America and Asia. 
ILLusTRaTIONS: Bull. Lab. Nat. Hist. Univ. Iowa 4: pl. 5, f. 21a, pl. 6, f. 23e. 
Exsiccati: Arth. & Holway, Ured. Exs. Ic. 21a, 23e; Barth. Fungi Columb. 4960; Barth. N. 
Am. Ured. 35, 1444; Ellis & Ev. Fungi Columb. 1187; Ellis & Ev. N. Am. Fungi 1836, 3576; Seym. 
& Earle, Econ. Fungi 60; Sydow, Ured. 1069, 1975. 
30. Dicaeoma Setarjae (Dietel & Holway), Arth. Résult. Sci. 
Congr. Bot. Vienne 344. 1906. 
Puccinia Setariae Dietel & Holway; Hotway, Bot. Gaz. 24:28. 1897. 
Oand I. Pyenia and aecia unknown. 
II. Uredinia epiphyllous, sometimes hypophyllous, ellipsoid or sublinear, 0.5-2 mm. long, 
early naked, pulverulent, cinnamon-brown, ruptured epidermis conspicuous; urediniospores 
globoid or broadly ellipsoid, 26-29 by 30-34 4; wall thick, about 3 u, golden-brown, closely 
and finely verrucose, the pores 6-8, scattered. 
III. Telia mostly epiphyllous, ellipsoid or oblong, crowded, 0.5-1.5 mm. long, early naked, 
pulvinate, blackish-brown, ruptured epidermis noticeable; teliospores broadly ellipsoid or 
obovoid, 26-34 by 39-48 yw, rounded or obtuse at both ends, slightly or not constricted at sep- 
tum; wall smooth, dark chestnut-brown, moderately thick, 2.5-3 n, much thicker at apex, 
7-13 »; pedicel stout, colorless, twice length of spore. 
On PoOscEsE: 
Chaetochloa geniculata (Lam.) Millsp. & Chase (C. purpurascens Scribn. & Merr., C. imberbis 
Scribn., Setaria purpurascens H.B.K., S. glauca imberbis Griseb., Panicum imberbe 
Poir.), Louisiana; Mexico (state). 
i ie LOCALITY: Near City of Mexico, Mexico, on ‘‘ Setaria imberbis’’, intended for S. glauca 
se “Die ee eauiONe Southern United States to southern Mexico. 
ILLUSTRATION: Bull. Lab. Nat. Hist. Univ. Iowa 4: gl. 12, f. 34a. 
Exsiccati: Arth. & Holway, Ured. Exs. Ic, 34a. ° 
31. Dicaeoma Cameliae (Mayor) Arthur & Fromme. 
Uredo Cameliae Mayor, Mém. Soc. Neuch. Sci. 5:578. 1913. 
Puccinia Cameliae Arth. Mycologia 7: 227. 1915. 
O and I. Pyenia and aecia unknown. 
II. Uredinia amphigenous, scattered, numerous, elliptic, small, 0.5 mm. long, rather 
tardily naked, cinnamon-brown; urediniospores ellipsoid, 15-21 by 19-28 4; wall pale-yellow 
to nearly colorless, thin, about 1 u, closely and very finely echinulate, the pores obscure, 6-8, 
scattered. 
III. Telia amphigenous, scattered, numerous, oblong or linear, 0.3-0.5 mm. long, blackish- 
brown, long covered by the epidermis, not bordered by stromal hyphae; teliospores firmly 
compacted, oblong to cylindric, small, 10-16 by 32-39 yu, truncate or rounded at both ends or 
sometimes narrowed below, slightly or not constricted at septum; wall chestnut-brown, thin, 
about 1», darker and somewhat thicker above, 3-5 »; pedicel very short, usually not seen. 
ON POACEAE: 
Chaelochloa composita (H.B.K.) Scribn. (Setaria composita H.B.K.), Texas. 
Chaetochloa polystachya (Scheele) Scribn. & Merr., Texas. 
Chaetochloa scandens (Schrad.) Scribn. & Merr. (Setaria scandens Schrad.), Jamaica. 
Chaetochloa setosa (Sw.) Scribn. (Panicum setosum Sw.), Mona Island. 
Type LOcALITY: Cafetal La Camelia near Angelopolis, Colombia, on Setaria scandens. 
DiIstRIBUTION: Central Texas and the West Indies; also in northern South America. 
32. Dicaeoma Arthuri (Sydow) Arthur & Fromme. 
Puccinia Arthuri Sydow, Monog. Ured. 1: 775. 1904. 
O and J. Pyenia and aecia unknown. 
II. Uredinia chiefly hypophyllous, scattered or somewhat grouped, oblong, 0.8-1.5 mm, 
long, soon naked, dark cinnamon-brown, ruptured epidermis noticeable; urediniospores broadly 
