Part 2, 1912] POACEAE 189 
A rather stout glabrous perennial with compressed stems, which often root at the lower 
nodes, flat leaf-blades and glabrous spikelets. Stems often branched, 5-12 dm. long; leaf- 
sheaths compressed, glabrous or the basal ones papillose-hirsute; blades 3 dm. long or less, 3- 
10 mm. wide, linear, flat, of medium texture, smooth or roughish, papillose-hirsute above near 
the base, otherwise glabrous; racemes 2-13, spreading or ascending, 4-9 cm. long, the rachis 
straight, 2-2.5 mm. wide; spikelets in pairs and often so crowded as to appear in 4 rows, red- 
brown, 2-2.3 mm. long, 1.5-1.8 mm. wide, broadly obovoid, glabrous, the first scale wanting, 
the second 5-nerved, the third 3-nerved, the fruiting scale deep-brown at maturity. 
TYPE LOCALITY : [South] Carolina. 
DISTRIBUTION: Virginia and Tennessee to Florida and Texas; Porto Rico. 
ILLUSTRATIONS: Bull. U. S. Dep. Agr. Agrost. 17: J. 327 ; Bull, Tenn. Exp. Sta.7: f. 17; Ell 
Bot. 8. C. & Ga. p1.6, f. 3. 
73. Paspalum paniculatum L. Syst. Nat. ed. 10. 855. 1759. 
Paspalum hemisphaericum Poir, in Lam. Encyc. 5: 31. 1804. 
? Paspalum stricium Pers. Syn. Pl. 1: 86. 1805. 
Paspalum compressicaule Raddi, Agrost. Bras. 29. 1823. 
Paspalum multispicum Steud. Syn. Gram. 18. 1854, 
Paspalum cognatissimum Steud. Syn. Gram. 18. 1854. 
Paspalum paniculatum rigidum Schlecht.; Fourn. Mex. Pl. Gram. 9. 1881. 
Paspalum affine Bello, Anal. Soc. Esp. Hist. Nat. 12: 125. 1883. 
Paspalum paniculatum minus Scribn. Field Columb. Mus. Publ. Bot. 2: 24. 1900. 
Stems up to 1 m. tall or more, smooth and glabrous, simple, the nodes usually barbed; 
leaf-sheaths glabrous or papillose-hispid; blades up to 3 dm. long and 2.5 cm. wide, long-acu- 
minate at the apex, rounded or subcordate at the base, glabrous or papillose-hispid ; racemes 
numerous, rarely less than 15, crowded, spreading or ascending, often curved, 3-10 cm. long, 
the rachis less than 0.5 mm. wide; spikelets in pairs, 1-1.5 mm. long, 0.8-1 mm. wide, broadly 
obovate to oval or nearly orbicular, pubescent, the first scale wanting, the second and third 
scales 3-nerved, the fruiting scale yellowish-green, oval, smooth and shining, 
TYPE LOCALITY: Jamaica. . . . 
DISTRIBUTION ; Jamaica and Cuba to Grenada; Mexico to Panama; also in tropical South 
America, 
ILLUSTRATIONS: Gaertn. Fruct. f/. 80; Trin. Ic. pl. 127. 
74. Paspalum squamulatum Fourn. Mex. Pl. Gram.11. 1881. 
Paspalum Sumichrast Fourn. Mex. Pl. Gram. 11. 1881. 
Stems 3-6 dm. long or more, prostrate at the base and often rooting at the lower nodes, 
glabrous; leaf-sheaths glabrous or sparingly hirsute, ciliate; blades up to 12 cm. long and 
1.5 cm. wide, lanceolate, softly pubescent on both surfaces, or sometimes glabrous above and 
sparingly pubescent below and ciliate; racemes normally 3-10, spreading or ascending, 2-4 cm. 
long, the rachis about 0.5 mm. wide, often with a few scattered weak hairs; spikelets in pairs, 
1.5-1.7 mm. long, about 1.3 mm. wide, broadly oval, glabrous, strongly convex, the first 
scale wanting, the second and third scales 3-nerved, the second markedly shorter than the 
third, the third equaling the fruiting scale, which is smooth and shining, yellowish-white, 
and nearly orbicular. 
TYPE LOCALITY: Chinantla, Oaxaca. . 
DISTRIBUTION : Southern Mexico to Costa Rica. 
75. Paspalum densum Poir. in Lam. Encyc. 5: 32. 1804. 
Stems up to 1 m. tall, stout, simple; leaf-sheaths glabrous, the lower and basal ones 
markedly reticulate; blades up to 8 dm. long, 1-1.5 cm. wide, glabrous, rough on the margins, 
flat, or the lower often folded; panicle 1-2 dm. long, dense, the numerous branches ascending 
or erect, up to 8 cm. long, the rachis 1-1.2 mm. wide, setiferous; spikelets 1.7~1.9 mm. long, 
1.5-1.7 mm. wide, glabrous, flat, yellowish, the first scale wanting, the second and third scales 
3-nerved, the fruiting scale nearly orbicular, only slightly convex on one side, prominently 
marked with papillae in longitudinal rows. 
TYPE LOCALITY : Porto Rico, . : . 
DISTRIBUTION : Cuba; Porto Rico; Guadeloupe ; also in tropical South America. 
ILLUSTRATION : Trin. Ic. p/. 122. 
