Part 2, 1912] POACEAE 109 
pidulous, the second scale equaling the first, acute, hispidulous on the keel, the fourth scale 
deeply 2-cleft for one quarter to one half its length, the awn 13-20 mm. long, the much-exserted 
column tightly spiral, the subula loosely so; pedicellate spikelet consisting of a single scale 
1-2.5 mm. long, short-awned. 
TYPE LOCALITY : Hispaniola. 
DISTRIBUTION: Florida and the Bahamas, and from Jamaica and Cuba to Guadeloupe. 
ILLUSTRATION: Bull. U. S. Dep. Agr. Agrost. 17: f. 312. 
22. Schizachyrium cubense (Hack.) Nash. 
Andropogon cubensis Hack. Flora 68: 121. 1885. 
Sorgum cubense Kuntze, Rev. Gen. 791. 1891. 
A perennial plant with extravaginal innovations and a branching rootstock. Stems 
erect, sparingly branched above, up to 7 dm. tall, smooth and glabrous; leaf-sheaths strongly 
striate, glabrous; blades filiform, less than 1 mm. in diameter, 6-12 cm. long, glabrous, or 
usually with a few long hairs on the upper surface near the base; spike-like racemes 4-5 cm. 
long, the internodes and the pedicels minutely pubescent on the back, the margins ciliate with 
long hairs above the base; sessile spikelet 5-5.5 mm. long, oblong-lanceolate, the first scale 
entire or shortly 2-toothed at the apex, hispidulous on the back, the fourth scale entire at the 
apex, or very minutely 2-toothed, terminating in an awn 5-7 mm. long, the column included 
in the scales and with but 1 or 2 spirals, usually less than one half as long as the subula; pedicel- 
late spikelet 2-3 mm. long, sometimes with a short awn. 
TYPE LOCALITY: Cuba. 
DISTRIBUTION : Known only from the type locality. 
23. Schizachyrium multinervosum Nash, sp. nov. 
A tufted perennial with low slender stems, short terete leaf-blades, and slightly hairy 
spike-like racemes. Leaf-sheaths striate, smooth and glabrous, shorter than the internodes; 
ligule a narrow scarious ring; blades 3-7 cm. long, involute, up to 1.5 mm. wide when spread 
out, the lower surface glabrous, with a broad median band of white tissue; spike-like racemes 
4-6 cm. long, straight, the internodes clavate and with a broad toothed hyaline margin at 
the apex, glabrous, the pedicels as long as the internodes or a little shorter, with a few long 
erect hairs on the outer margin near the apex, otherwise glabrous; sessile spikelet 4-4.5 mm. 
long and about 1.75 mm. wide, elliptic, the first scale 11-13-nerved, all but the keel-nerves 
vanishing at the hyaline and slightly 2-toothed apex, hispidulous on the keels above the 
middle, the second scale 1-nerved, keeled, acute, about as long as the first scale, the third 
scale hyaline, oblong, about three fourths as long as the spikelet, long-ciliate above the 
middle, the fourth scale 2-cleft to the middle, the teeth ciliate, the awn perfect, about 1.5 cm. 
long, the much-exserted brown tightly spiral column about as long as the light-colored hispidu- 
lous subula which is somewhat flexuous below; pedicellate spikelet about 3 mm. long, usually 
of 2 scales, the first one about 7-nerved. 
Type collected in eruptive rock soil, Madruga, Cuba, March 25, 1903, Britton & Shafer 608 
(herb. N. Y. Bot. Gard.). 
DISTRIBUTION : Central Cuba. 
22. ANDROPOGON L.. Sp. Pl. 1045. 1753. 
Dichanthium Willem. Ann. Bot. Usteri 18:11. 1796. 
Anatherum Beauv. Agrost. 128. 1812. 
Cymbopogon Spreng. Pugill.2: 14. 1815. 
Lepeocercis Trin, Fund. Agrost, 203. 1820. 
Hypogynium Nees, Agrost. Bras. 364. 1829. 
Dimetostemon Raf.; Bull. Bot. Seringe 221. 1830. 
Diplasanthum Desv. Opuse. 66. 1831. 
Agenium Nees; Lindl. Introd, Nat. Syst. ed. 2. 447, 1836. 
Luklastaxon Steud. Syn. Gram. 412. 1855. 
Exotheca Anderss. Nova Acta Soc. Sci. Upsal. III. 2: 253. 1856. 
Usually perennial, rarely annual, grasses, varying in habit, commonly with branched 
stems, the spike-like racemes in pairs, or digitately in 3’s—5’s, very rarely single, the spathes 
enclosing or distant from them. Rachis of the racemes fragile, the internodes and pedicels 
