HITCHCOCK AND CHASE—GRASSES OF THE WEST INDIES. 287 
1. Sorghastrum parviflorum (Desv.). 
Sorghum parviflorum Desv.; Hamilt. Prodr. Pl. Ind. Oce. 12. 1825, 
Andropogon setosus Griseb. Cat. Pl. Cub. 235, 1866. 
Andropogon agrostoide Speg. Anal, Soc. Cienc. Argentina 16: 186. 1883. 
Andropogon francavillanus Fourn. Mex. Pl. 2: 56. 1886. 
Sorghastrum francavillanum Hitche. Contr. U. S. Nat. Herb. 12: 195. 1909. 
Sorghastrum setosum Hitche, Contr. U. S. Nat. Herb. 12: 195. 1909. 
Sorghastrum agrostoides Hitche. Bot. Gaz. 51: 300. 1911. 
A tall erect tufted glabrous perennial with long, flat or subinvolute blades 
and long lanceolate panicles with slender or subcapillary branchlets and pedun- 
cles and golden brown spikelets, the ultimate peduncles, the sterile pedicels, 
and the base of the spikelet clothed with white hairs; awn variable in length. 
Grassy hillsides, southern Mexico and the West Indies to Argentina. Orig- 
inally described from Hispaniola. The type of Andropogon setosum is from 
Cuba. Grisebach cites Piptatherum setosum A. Rich., “ex descr.,” but Rich- 
ard’s description does not well apply to this species. It is probably wiser to 
consider Andropogon setosum as a new species rather than as a change of name 
and to take Grisebach’s specimen, Wright 3897, as the type. Andropogon 
agrostoide was described from Argentina and Andropogon francavillanus from 
Mexico. 
Central Cuba, Jamaica, Haiti, Santo Domingo, and Porto Rico (vicinity of 
San Juan). 
2. Sorghastrum stipoides (H. B. K.) Nash, N. Amer. Fl. 17: 129. 1912. 
Andropogon stipoides H. B. K. Nov. Gen, & Sp. 1: 189. 1816. 
Andropogon domingensis Spreng.; Steud. Nom. Bot. ed. 2. 1: 91. 1840, as 
synonym of A. stipoides. 
More slender than the preceding, the narrower blades convolute, the spikelets 
slightly larger, and the awns well developed. 
Palm barrens, eastern Cuba (Guane, Shafer 10353) and Colombia to Brazil. 
Originally described from Colombia. This is the species referred by Hitch- 
cock’ to S. francavillanum, 
17. HETEROPOGON Pers. 
Racemes solitary, the lower part of the rachis not disjointing, bearing 2 to 5 
pairs of staminate awnless spikelets, the upper part of the rachis disarticulat- 
ing obliquely at the base of each joint, each forming a sharp callus below the 
long-awned sessile perfect spikelet, the pedicellate spikelet staminate. 
1. Heteropogon contortus (L.) Beauv.; Roem. & Schult. Syst. Veg. 2: 836. 
1817. 
Andropogon contortus L, Sp. Pl. 1045. 1753. 
Andropogon secundus Willd.; Nees, Agrost. Bras. 364. 1829. 
A tall branching annual with compressed culms, keeled sheaths, scabrous 
blades, and solitary racemes of imbricate spikelets, the lower awnless, the 
upper with long brown bent awns. Lemon-scented when fresh. 
Rocky slopes, warmer parts of both hemispheres. Originally described from 
India. 
Cuba, Jamaica, Haiti, Santo Domingo, Antigua, and Guadeloupe. 
* Contr. U. S. Nat. Herb. 12: 195. 1909, 
47877°—17-——3 
