Part 2, 1912] POACEAE 175 
A tufted branched perennial with flat ciliate leaf-blades and glabrous spikelets. Stems 
2.5-8 dm. tall; leaves mostly toward the base of the stem, giving it a naked appearance; leaf- 
sheaths glabrous, except the pilose margins; blades 1 dm. long or less, 4-10 mm. wide, lanceo- 
late to linear, flat, of medium texture, glabrous, or the upper surface pubescent with short 
appressed hairs, a dense row of erect stiff hairs just back of the ligule, the margins con- 
spicuously ciliate; racemes single or in 2’s, 2-8 cm. long, rather slender, usually curved, the 
rachis about 0.5 mm. wide; spikelets in pairs, about 1.5 mm. long, 1-1.2 mm. wide, broadly 
obovate, glabrous, the first scale wanting, the second 3-nerved, the third 2-nerved by the sup- 
pression of the midnerve, the fruiting scale yellowish-white. 
TYPE LOCALITY: North Carolina. 
DISTRIBUTION: Kentucky to Florida and Texas. 
ILLUSTRATIONS: Bull. Tenn. Exp. Sta.7: f. 23; Britt. & Brown, Ill. Fl. f 23. 
17. Paspalum stramineum Nash, in Britton, Man. 74. 1901. 
A tufted branched perennial, with light yellowish-green foliage, flat leaf-blades which are 
appressed-pubescent on the upper surface, and usually pubescent spikelets. Stems 2—8 dm. tall; 
leaf-sheaths loose, the basal ones softly and densely pubescent, the remaining sheaths glabrous 
except on the ciliate margin; blades 2.5 dm. long or less, 5-10 mm. wide, flat, firm, erect, 
linear or lanceolate, appressed-pubescent on the upper surface and with a few scattered long 
hairs, the midrib of the lower surface also sometimes with a few long hairs, long-ciliate on the 
margins, and with a ring of long stiff hairs at the base on the upper surface just back of the ligule; 
racemes 4-10 cm. long, on the main stem usually 2, rarely 1 or 3, single on the branches; spike- 
lets in pairs, on shorter pubescent pedicels, orbicular, 2 mm. in diameter, the first scale wanting, 
the second 3-nerved, pubescent with short spreading glandular-tipped hairs or sometimes 
glabrous, the third glabrous or nearly so, 2-nerved by the suppression of the midnerve, the 
fruiting scale yellowish-white. 
TYPE LocaLity: [Near Mullen, Hooker County,] Nebraska. 
DISTRIBUTION : Indiana to Colorado, south to Texas and Mexico. 
18. Paspalum ciliatifolium Michx. Fl. Bor. Am. 1:44. 1803. 
Paspalum debile Ell. Bot. S. C. & Ga.1:105. 1816. Not P. deb7le Michx. 1803. 
Paspalum setaceum ciliatifolium Vasey, Contr. U. S. Nat. Herb. 3:17. 1892. 
Paspalum blepharophyllum Nash, in Small, Fl. SE. U.S. 71. 1903. 
A tufted branched perennial, with flat ciliate leaf-blades, and glabrous spikelets. Stems 
4-8 dm. tall; leaf-sheaths rather loose, glabrous, or ciliate on the margin; blades 2.5 dm. long 
or less, 6-15 mm. wide, flat, linear to lanceolate, smooth and glabrous on both surfaces, con- 
spicuously ciliate with long hairs on the margins, and with a row of stiff erect hairs at the base 
just back of the ligule; racemes single, or sometimes in 2’s, 5-11 cm..long, usually more or 
less curved, the rachis 1 mm. wide or less; spikelets in pairs, 1.8-2.1 mm. long, 1.5-1.8 
mm. wide, oval to broadly obovate, glabrous, the first scale wanting, the second and third 
scales 3-nerved, or the third rarely 2-nerved by the suppression of the midnerve, the fruit- 
ing scale yellowish-white. 
TYPE LOCALITY: Carolina. s . 
DISTRIBUTION: Maryland to Colorado, and south to Florida, Texas, and Sonora; also in Bermuda. 
ILLUSTRATIONS: Vasey, Agr. Grasses U.S. pl. 3 (as P. setaceum); Bull. Tenn. Exp. Sta.7: f. 22. 
19. Paspalum Chapmani Nash, Bull. N. Y. Bot. 
Gard. 1: 290, 1899. : 
? Paspalum latifolium Le Conte, Jour. de Phys. 91: 284. 1820. 
Paspalum propinquum Nash, Bull. N, Y. Bot. Gard. 1: 291. 1899. 
A tufted branched perennial, with ciliate leaf-blades and pubescent spikelets. Stems 
8-10 dm. tall, smooth and glabrous; leaf-sheaths loose, the basal ones pubescent with short 
hairs, the remaining sheaths glabrous, or pubescent on the margin; blades 2 dm. long or less, 
5-14 mm. wide, lanceolate to linear, erect or nearly so, smooth and glabrous on both surfaces, 
ciliate, the hairs arising from papillae; racemes 8-12 cm. long, straight or curved, the rachis 
flat and 0.8-1 mm. wide, the main stem usually bearing two racemes, the branches only one 
