360 CONTBIBUTIONS FllOM THE NATIONAL HERBARIUM. 



December 18, 1912, by A. S. Hitchcock (no. 10267). Specimens of the species 

 were first received from Dr. I. Urban, for whom the species is named in recogni- 

 tion of his work on the West Indian flora. 



This species is allied to the small-leaved Raddia nana, R. distichophylla, and 

 R. polypodioides, but differs from them in having larger blades, and in having 

 the fruit exceeded by the glume and sterile lemma. 



Only known from Tobago (The Widow, Broadway 3004, 4360, and Eggers 5841, 

 besides the type collection). 



3. Raddia nana (Doell) Chase, Proc. Biol. Soc. Washington 21: 185. 1908. 



Olyra nana Doell in Mart. Fl. Bras. 2* : 329. 1877. 



A tufted straggling perennial with delicate, nearly simple culms 10 to 30 cm. 

 long, naked below, the small flat oblong-triangular spreading or deflexed blades 

 10 to 12 mm. long, 5 to 7 mm. wide, bearing at the rounded apex a minute mucro- 

 nate tip, approximate along the upper part of the culm, the small few-flowered 

 axillary racemes scarcely exserted from the upper sheaths. 



Wet sandy savannas, Trinidad (Aripo Savanna, Cumuto Station) to Brazil, 

 whence originally described. 



55. MNIOCHLOA Chase. 



Plants dioecious; inflorescence a pair of slender racemes, one pistillate, the 

 other staminate, at the summit of a naked culm ; pistillate spikelets subsessile ; 

 first glume wanting; second glume and sterile lemma subequal, obtuse, or sub- 

 acute ; fruit white, cartilaginous, subindurate ; staminate spikelets smaller, 

 reduced to the lemma and palea. 



Flowering culms much exceeding the sterile ones ; fruit glabrous. 



1. M. pulchella. 

 Flowering and sterile culms about equal in height ; fruit pubescent. 



2. M. strephioides. 



1. Mniochloa pulchella (Griseb.) Chase, Proc. Biol. Soc. Washington 21: 186. 



pi. J,. 1908. 



Digitaria pulchella Griseb. Cat. PI. Cub. 231. 1866. 



Strephiumf pulchellum Wright, Anal. Acad. Cienc. Habana 8: 202. 1871. 



A delicate tufted perennial, the capillary naked flowering culms 10 to 25 cm. 

 tall, ascending from a geniculate base, the racemes 2 to 3 cm. long, the pros- 

 trate leafy sterile culms 6 to 10 cm. long, the flat spreading lanceolate-oblong 

 blades 10 to 12 mm. long, about 5 mm. wide. 



On precipices, eastern Cuba. Only known from the type collection, Wright 

 3448, from El Yunque de Baracoa, Cuba. 



2. Mniochloa strephioides (Griseb.) Chase, Proc. Biol. Soc. Washington 21: 



186. 1908. 



Olyra strephioides Griseb. Cat. PI. Cub. 229. 1866. 



Less delicate than M. pulchella, the flowering culms 5 to 8 cm. tall, the 

 racemes 1.5 to 2 cm. long, the sterile leafy culms as much as 20 cm. long. 



Damp slopes, western Cuba, whence originally described, Wright 3435 being 

 Ihe type specimen. Also found near San Diego de los BaSos (Le6n 4391, 

 4572, 4593) and Campo Florido {Ledn 4140). 



56. PHARUS L. 



Spikelets in pairs, appressed along the slender spreading, nearly simple 

 panicle branches, on pistillate, subsessile, the other staminate, pedicellate, 

 much smaller than the pistillate splkelet; fertile lemma subindurate, terete, 



