Part 5, 1920] AECIDIACEAE 351 
ON CYPERACEAE: 
Fimbristylis diphylla (Retz.) Vahl, Martinique; Porto Rico. 
Fimbristylis Holwayana Fernald, Jalisco. 
Fimbristylis polymorpha Béck., Morelos. 
Fimbristylis puberula (Michx.) Vahl, Texas. 
TYPE LOCALITY: Cuernavaca, Mexico, on Fimbristylis polymorpha, 
DisTRIBUTION: Texas, West Indies and southern Mexico. 
Exsiccati: Barth. N. Am. Ured. 1443. 
116. Dicaeoma superius Arthur. 
Uredo superior Arth. Bull. Torrey Club 31:5. 1904. 
O and I. Pyenia and aecia unknown. 
II. Uredinia amphigenous, elongate, tectate, spores escaping through slits in the epi- 
dermis; urediniospores globoid or ellipsoid, 18-29 by 30-36 “; wall variable in thickness, 2-3.5 y, 
sometimes less, light chestnut-brown, moderately or thickly echinulate, the pores 2, super- 
equatorial. 
III. Telia unknown. 
On CYPERACEAE: 
Fimbristylis ferruginea (1,.) Vahl, Cuba; Porto Rico. 
Fimbristylis spadicea Vahl, Haiti; Porto Rico. 
H LOCALITY: Along the coast eight miles west of Ponce, Porto Rico, on Fimbristylis spadicea. 
DistRIBution: West Indies; also in South America. 
117. Dicaeoma (?) Dichromenae Arthur. 
Uredo Dichromence Arth. Bull. Torrey Club 33:31. 1906. 
O and I. Pyenia and aecia unknown. 
II. Uredinia hypophyllous, scattered, oblong, 0.2-0.5 mm. long, covered by the over- 
arching epidermis; paraphyses none; urediniospores elliptic or broadly obovate, 18-23 by 22- 
35 u; wall light-yellow, moderately thick, 1.5~2 », sharply and sparsely echinulate, the pores 
obscure, probably 3 or 4, equatorial. 
III. Telia unknown. 
On CYPERACEAE: 
Dichromence ciliata Vahl, Porto Rico. 
Dichromena radicans Cham. & Schlecht., Costa Rica; Jamaica; Porto Rico. 
TYPE LOCALITY: Mayagiiez, Porto Rico, on Dichromenea radicans. 
DISTRIBUTION: West Indies and Costa Rica; also in South America. 
118. Dicaeoma Rosenii Arthur. 
Puccinia Rosenit Arth. Bull. Torrey Club 45: 144. 1918. 
O and I. Pyecnia and aecia unknown. 
II. Uredinia hypophyllous, scattered or often in more or less evident series parallel with 
the veins on indefinite, discolored spots, oval or linear, 0.5-2 mm. long, rather tardily naked, 
slightly pulverulent, dark cinnamon-brown, ruptured epidermis conspicuous; wrediniospores 
30-35 « long, when seen with pores in optical section oblong, 10-20 x wide, when seen with 
pores central globoid or broadly ellipsoid, 28-35 4; wall cinnamon-brown, 1.5-2 « thick, 
moderately or sparsely echinulate, the pores 2, superequatorial. 
III. Telia hypophyllous, few, disposed like the uredinia, oblong or linear, tardily naked, 
pulvinate, chocolate-brown, ruptured epidermis conspicuous; teliospores clavate or cylindric, 
16-23 by 43-67 », rounded or truncate above, usually narrowed below; wail chestnut-brown 
above, somewhat lighter below, 1-2 » thick, much thicker at apex, 5~10 4, smooth; pedicel 
colorless, thick-walled, somewhat shorter than spore, persistent. 
On CYPERACEAE: . 
Schoenus nigricans I,., Florida. . 
TYPE LocaLity: Florida, on Schoenus nigricans. | 
DISTRIBUTION: Known only from the type locality. 
119. Dicaeoma angustatoides (R. E. Stone) Arthur. 
Puccinia angustatoides R. E. Stone, Bull. Torrey Club 36: 549. 1909. 
O and I. Pycnia and aecia unknown. 
II. Uredinia hypophyllous, scattered, oblong or linear, 0.5~-1 mm. long, rather early naked, 
pulverulent, cinnamon-brown, ruptured epidermis conspicuous; urediniospores obovoid or 
