Part 2, 1912] POACEAE 107 
15. Schizachyrium acuminatum Nash, in Small, Fl. SE. 
U.S. 59. 1903. 
Stems tufted, 7-10 dm. tall, the branches in 1’s-3’s; leaf-sheaths generally rough toward 
the summit, compressed, keeled; blades 2 dm. long or less, 5 mm. wide or less, rough; spike- 
like racemes finally exserted, 3-6 cm. long, the hairs of the internodes and pedicels grayish- 
white; sessile spikelet 1 cm. long, about twice the length of the internode, the awn about 1.5 
em. long, geniculate; pedicellate spikelet consisting of 2 scales, the first 4-5 mm. long, strongly 
hispidulous and bearing an awn 2 mm. long or less, the pedicel about two thirds as long as the 
sessile spikelet. 
TYPE LOCALITY: Starkville, Mississippi. 
DISTRIBUTION : Known only from the type locality. 
16. Schizachyrium neo-mexicanum Nash. 
Andropogon neo-mexicanus Nash, Bull. Torrey Club 25: 83. 1898. 
A tufted perennial with intravaginal innovations. Stems up to 1 m. tall, branching, the 
branches single or in pairs from the upper axils; leaf-sheaths shorter than the internodes, 
keeled, glabrous; blades 8-15 cm. long, 2-3 mm. wide, erect, rough; spike-like racemes 4-5 
cm. long, the rachis straight, the internodes one half to two thirds as long’as the sessile spike- 
lets, long-ciliate on the margins with ascending white silky hairs, those at the apex about 3 
mmm. long, the pedicels about two thirds as long as the sessile spikelets, ciliate on the margins 
with long white silky hairs; sessile spikelet 8-9 mm. long, lanceolate, acuminate, glabrous, 
the third and fourth scales ciliate, the latter deeply 2-cleft for about one third its length, 
the awn 12-15 mm. long, the brown column tightly spiral, barely if at all exserted, shorter 
than the subula; pedicellate spikelet of a single subulate rough short-awned scale 5-6 mm. 
long. 
TYPE LOCALITY : White Sands, Dofia Ana County, New Mexico. 
DISTRIBUTION : New Mexico. 
17. Schizachyrium littorale (Nash) Bicknell, Bull. Torrey 
Club 35: 182. 1908. 
Andropogon littoralis Nash, in Britton, Man.°69. 1901. 
Andropogon scoparius littoralis Hitchc. Rhodora 8 : 205. 1906. 
A densely tufted perennial, the innovations with glaucous leaves with much compressed 
sheaths. Stems 8-10 dm. tall, compressed, branched; leaf-sheaths rough, keeled, those on 
the innovations much compressed; blades up to 2 dm. long, 3-7 mm. wide, rough, acute, 
strongly keeled on the lower surface; racemes usually 3-4 cm. long, the rachis commonly 
straight, the internodes from one half to two thirds as long as the sessile spikelets, long-ciliate 
on the margins, the hairs at the apex 4-5 mm. long, the pedicels, which are usually recurved, 
longer than the internodes, long-ciliate; sessile spikelet 8-10 mm. long, linear-lanceolate, 
glabrous, the fourth scale shortly 2-toothed at the apex, ciliate, the awn 1-1.5 cm. long, the 
brown column tightly spiral, barely if at all exserted from the scales, shorter than the subula; 
pedicellate spikelet a single awned scale. 
TYPE LOCALITY: In sand along the seashore, New York. 
DISTRIBUTION : In sand along the coast, Nantucket, Massachusetts, to Virginia. 
18. Schizachyrium maritimum (Chapm.) Nash, in Small, Fl. SE. 
U.S. 59. 1903. 
Andropogon maritimus Chapm. FI. S. U. S. ed. 2. 668. 1883. 
A glaucous perennial, with long creeping rootstocks, and smooth and glabrous leaves 
with spreading blades. Stems 4-6 dm. tall; Jeaf-sheaths compressed, keeled, the lower 
ones crowded and overlapping; blades 1 dm. long or less, 2-4 mm. broad, widely spread- 
ing; spike-like racemes usually partly included at the base, 3-4 cm. long, rather stout, the 
rachis commonly stout, the internodes about one half as long as the sessile spikelets, long- 
ciliate on the margins, the terminal hairs 5-7 mm. long, the pedicels as long as or longer than 
