294 NORTH AMERICAN FLORA [VoLUME 7 
ellipsoid or oblong, 21-28 by 26-35 yu; wall cinnamon-brown, 1.5-2.5 uw thick, finely and moder- 
ately echinulate, the pores 3 or 4, equatorial. 
Til. Telia amphigenous, numerous, scattered, seldom confluent, elliptic or oblong, 0.5— 
i mm. long, rather tardily naked by the longitudinal rupture of the epidermis, blackish-brown, 
compact, ruptured epidermis conspicuous; teliospores broadly ellipsoid or oblong, 20-29 by 
32-42 u, rounded, obtuse or acute at apex, rounded or tapering at base, slightly or not con- 
stricted at septum; wall smooth, dark chestnut-brown, 1.5-2 » thick, moderately thickened 
above, 5-7 4; pedicel stout, persistent, colorless, long, up to twice length of spore or more. 
ON POoAcEAE: 
Pennisetum crinitum (H.B.K.) Spreng. (Gymnothrix crinita H.B.K.), Michoacan. 
TYPE LocaLity: [Patzcuaro], Mexico, on ‘Pennisetum mexicanum,” error for P. crinitum. 
DIstRIBUTION: South-central Mexico; also in northwestern South America and in Asia. 
InLustrations: Bull. Lab. Nat. Hist. Univ. Iowa 5: pl. 4, f. 42c, d. 
ExsiceaTi: Arth. & Holway, Ured. Exs. Ic. 42c, d. 
33. Dicaeoma Cenchri (Dietel & Holway) Arth. Résult. Sci. Congr. 
Bot. Vienne 344. 1906. 
Puccinia Cenchri Dietel & Holway; Holway, Bot. Gaz. 24:28. 1897. 
O and I. Pyenia and aecia unknown. 
II. Uredinia amphigenous, or epiphyllous only, scattered, elliptic, small, about 0.5 mm. 
long, tardily naked, chestnut-brown, somewhat pulverulent, ruptured epidermis apparent; 
urediniospores irregularly ellipsoid or oblong, 24-35 by 32-48 u; wall cinnamon- to light chest- 
nut-brown, moderately thick, 2-3 4, rather prominently and sparsely echinulate, the pores 
usually 2, often 3, equatorial, prominent. 
Ill. Telia hypophyllous, scattered, narrowly oblong or linear, small, 0.5-1 mm. long, 
blackish-brown, long covered by the epidermis; teliospores oblong, cylindric, or clavate, 18-27 
by 40-58 u, truncate, rounded or obtuse above, narrowed below, moderately or not constricted 
at septum; wall smooth, cinnamon- or dark chestnut-brown, about 1.5 » thick, moderately 
thickened at apex, 6-9 4; pedicel very short, tinted. 
ON POACEAE: 
Cenchrus echinatus 1,., Florida; Costa Rica; Guatemala; Bahamas; Cuba; Mona Island; 
Porto Rico. 
Cenchrus pauciflorus Benth. (C. carolinianus recent authors not Walt.), Oklahoma, Texas; 
Porto Rico. 
Cenchrus viridis Spreng., Guatemala; Panama; Cuba; Jamaica; Porto Rico. 
Pennisetum multiflorum (Presl) Fourn. (Cenchrus multiflorus Prest), Jalisco. 
Type Locality: Guadalajara, Mexico, on Cenchrus multi fiorus. 
Distripvrion: Southern Florida and northern Oklahoma to Panama, and the West Indies. 
ILLUSTRATION: Bull. Lab. Nat. Hist. Univ. Iowa 5: pl. 3, f. 41a. 
Exsiccati: Arth. & Holway, Exs. Ured. Ic. 4/a. 
34. Dicaeoma deformatum (Berk. & Curt.) Kuntze, Rev. Gen. 33: 
468. 1898. 
Puccinia deformata Berk. & Curt.; Berk. Jour. Linn. Soc. 10: 357. 1869. 
O and I. Pycnia and aecia unknown. 
II. Uredinia bypophyllous or caulicolous, scattered, oval, minute, 0.1-0.2 mm. in diam- 
eter, early naked, pulverulent, yellow, ruptured epidermis evident; paraphyses wanting; 
urediniospores obovoid, 18-24 by 26-32 u; wall colorless or pale-brown, 1-1.5 » thick, rather 
sparsely and conspicuously echinulate, the pores very indistinct, probably 2 and equatorial. 
III. Telia amphigenous and caulicolous, crowded and often confluent, elliptic, 0.5-1 mm. 
long, early naked, pulvinate, velvety, chestnut-brown; teliospores oblong or ellipsoid, usually 
irregular with septum oblique or nearly vertical, 21-29 by 32-39 yw, rounded at both ends; 
wall smooth, dark cinnamon-brown, thick, 3-4», somewhat thicker above, 5—7 u; pedicel 
pale-yellow to nearly colorless, very long and slender, up to 5 or 6 times length of spore. 
On POACEAE: 
Olyra latifolia I,., Nicaragua; Cuba; Jamaica; Porto Rico. 
TYPE LOCALITY: Cuba, on Olyra latifolia. ; ; . 
DIstTRIBUTION: West Indies and Central America; also in South America. 
