HITCHCOCK AND CHASE GRASSES OF THE WEST INDIES. 377 



Open ground and waste places, Texas and the West Indies to South America. 

 Originally described from Jamaica. Chloris propinqua was described from 

 Guadeloupe. 



Bahamas (New Providence), Cuba, Jamaica, Santo Domingo, Porto Rico 

 (Ponc9), St. Croix, Antigua, Guadeloupe, Martinique, and Grenada. 



10, Chloris polydactyla (L.) Swartz, Prodr. Veg. Ind. Occ. 26. 1788. 



Andropogon barbatus L. Syst. Nat. ed. 10. 2: 1305. 1759. 



Andropoffon polydactylon L. Sp. PI. ed. 2. 14S3. 1763. 



Chloris barbata Nash, Bull. Torrey Club 25: 443. 1898, not Chloris barhata 

 Swartz, 1797 (this being Andropogon bm'batus L., 1771, from the East 

 Indies). 



Culms rather stout, commonly more than 1 meter tall ; blades about 1 cm. 

 wide; spikes 5 to 10, pale, usually 8 to 10 cm. long, strongly flexuous. The 

 tallest species of the genus in the West Indies. 



Savannas and grassy slopes, Florida and the West Indies to Brazil. Origi- 

 nally described from Jamaica. 



Bahamas (New Providence, Cat Island), Jamaica, and Antigua. 



79. GYMNOPOGON Beauv. 



Spikelets with 1 perfect floret and 2 or 3 sterile florets, mostly reduced to 

 single awns, above it; glumes equaling or exceeding the florets; fertile lemma 

 narrow, long-awned ; spikelets distant or approximate, appressed along a slender 

 axis. 



Spikes 2 to 4 cm. long, aggregated at the summit of the naked culms. 



1. G. foliosus. 

 Spikes 15 to 25 cm. long, scattered along the upper part of the culms. 



2. G. spicatus. 



1. Gymnopogon foliosus (Willd.) Nees, Agrost. Bras. 426. 1829. 

 Chloris foliosa Willd. Sp. Pi. 4: 924. 1806. 



Biatherium foliosum Desv. Opusc. 72. 1831. 



Aristida geminata Willd.; Steud. Nom. Bot. ed. 2. 1: 131. 1840, as synonym. 



Chloris aristata Salzm. ; Steud. Syn. PI. Glum. 1: 218. 1854, as synonym. 



A tufted annual, the wiry branching, short-jointed culms ascending (some- 

 times decumbent at base), 15 to 50 cm. tall, with numerous short, squarrose 

 blades and a subdigitate inflorescence of few to several ascending, delicately 

 awned spikes. 



White sand barrens near Laguna del Tortuguero, Porto Rico, Santo Domingo 

 (locality unknown), St. Thomas, and northern South America. Originally de- 

 scribed from St. Thomas. 



2. Gymnopogon spicatus (Spreng.) Kuntze, Rev. Gen. PI. S'': 354. 1898, 

 Polypogon spicatus Spreng. Syst. Veg. 1 : 243. 1825. 



Gymnopogon laevis Nees, Agrost. Bras. 428. 1829. 



Oymnopogon fiUformis Griseb. Fl. Brit. W. Ind. 538, 1864, 



A straggling perennial with slender wiry culms 0.5 to 1 meter long, thickish 

 blades 3 to 7 cm. long, the inflorescence commonly nearly half the entire length 

 of the plant, the slender divaricate spikes naked or nearly so for the lower 

 one-third to half their length. 



Sterile hills, Trinidad (locality unknown, Trin. Bot. Gard. Herb. 3361) to 

 Argentina. Originally described from Brazil. The type locality of O. laevis 

 is Brazil, of O. flUformis. Trinidad. 



