Part 4, 1920] AECIDIACEAE 287 
II. Uredinia chiefly hypophyllous, few, scattered, linear or oblong, 0.2-2 mm. long, early 
naked, opening by a longitudinal slit, pulverulent, cinnamon-brown, ruptured epidermis 
usually conspicuous; urediniospores globoid or broadly ellipsoid, 19-26 by 24-29; wall 
cinnamon-brown, uniformly 2.5-3.5 » thick, finely and closely verrucose, the pores 3, some- 
times 2, equatorial. 
III. Telia chiefly hypophyllous, scattered, linear or oblong, 0.2-2 mm. in length, early 
naked, opening by a longitudinal slit, compact, blackish-brown, ruptured epidermis noticeable; 
teliospores broadly ellipsoid, 23-26 by 31-35 u, rounded at both ends, only slightly constricted 
at septum; wall chestnut-brown, 3-4 u thick, 5-7 « thick at apex, including a broad, low, con- 
colorous umbo, smooth; pedicel hyaline, 9 » broad, not tapering, the wall 1 » thick, up to 85 
long, usually persistent. 
ON PoackEaE: 
Anthephora hermaphrodita (L.) Kuntze (A. elegans Schreb.), Cuba; Jamaica; St. Croix. 
Tyre LocaLity: Cuba, on Anthephora elegans. 
DISTRIBUTION: West Indies. 
18. Dicaeoma Huberi (P. Henn.) Arthur & Fromme. 
Puccinia Huberi P. Henn. Hedwigia Beibl. 39: 76. 1900. 
Puccinia Puttemansii P. Henn. Hedwigia 41: 105. 1902. 
Puccinia dolosa Arth. & Fromme, Torreya 15: 262. 1915, 
O and I. Pycnia and aecia unknown. 
II. Uredinia’ amphigenous, scattered or in small groups, on discolored areas, rounded or 
elliptic, small, 0.5 mm. long, rather tardily dehiscent by a longitudinal rupture, cinnamon- 
brown, pulverulent, ruptured epidermis evident; urediniospores ellipsoid or obovoid, 16-23 by 
21-30 »; wall pale golden-brown, thin, 1-1.5 4, moderately and rather strongly echinulate, 
the pores 2 or 3, equatorial. 
III. Telia amphigenous, few, elliptic, small, 0.5 mm. long, tardily naked, chocolate-brown, 
ruptured epidermis apparent; teliospores ellipsoid or oblong, sometimes irregular with the 
septum vertical or at an angle, 18-26 by 26~42 uw, usually rounded above, rounded or tapering 
below, slightly or not constricted at septum; mesospores sometimes present; wall chestnut- 
brown, moderately thin, 1.5—2 u, somewhat thicker at apex, 3-7 wu; pedicels golden- or cinnamon- 
brown, persistent, short, about one half length of spore. 
On PoackEsE: 
Panicum fasciculatum Sw., Cuba; Porto Rico. 
Panicum trichoides Sw., Porto Rico. 
Panicum utowanaeum Scribn., Mona Island. 
Paspalum paniculatum ., Morelos. 
Paspalum tenellum Willd., Jalisco, Mexico (state). 
Paspalum virgatum L., Cuba. 
Tyre LocaLity: Botanical Garden, Para, Brazil, on Panicum ovalifolium. 
DIstRIBUTION: West Indies and southern Mexico; also in northern South America. 
ILLUSTRATION: Sydow, Monog. Ured. 1: pl. 41, f. 539. 
Exsiceati: Arth. & Holway, Ured. Exs. Ic. 426; Sydow, Ured. 1986. 
19. Dicaeoma macrum (Arth. & Holway) Arthur & Fromme. 
Puccinia macra Arth. & Holway; Arth. Am. Jour. Bot. 5: 465. 1918. 
O and I. Pycnia and aecia unknown. 
II. Uredinia chiefly hypophyllous, scattered or in small linear groups, circular or elliptic, 
small, 0.5-1 mm. long, early naked, orange or yellowish, pulverulent; urediniospores ellip- 
soid, 23-29 by 28-35 p; wall thin, 1-1.5 4, pale-yellow, finely and moderately or rather sparsely 
echinulate, the pores about 8, scattered. 
Ill. Telia hypophyllous, scattered or sometimes crowded and confluent, elliptic or ob- 
long, 0.5—1.5 mm. long, early naked, dark chestnut-brown, ruptured epidermis evident; telio- 
spores ellipsoid or obovoid-ellipsoid, 23-28 by 35-48 », rounded at both ends or slightly nar- 
rowed below, slightly constricted at septum; wall chestnut-brown, 1.5-2 p thick, slightly 
thickened above, 5-7 », smooth; pedicel tinted or nearly colorless, as long as spore. 
ON PoacEsE: 
Paspalum candidum (Humb. & Bonpl.) Kunth, Guatemala. 
Type LocaLity: Solola, Guatemala, on Paspalum candidum, 
DISTRIBUTION: Known only from the type locality. 
