172 NORTH AMERICAN FLORA [VoromE 17 
summit of the stem, sometimes single, 3-12 cm. long, the brown rachis-wings 2-3.5 mm. wide; 
spikelets elliptic to obovate, 2.5-3 mm. long, singly arranged, the callus barbed, the first 
scale wanting, the second and third scales 2-nerved, the midnerve wanting, the nerves marginal, 
ciliate above the middle with two kinds of hairs, one much stouter than the other, below 
the middle with one kind, the fruiting scale a little shorter than the outer scales, obovate. 
TYPE LOCALITY: South America. ; 
DISTRIBUTION : Mexico to Panama; also in tropical South America. 
ILLUSTRATION: Trin. Ic. pl. 284. 
5. Paspalum trachycoleon Steud. Syn. Gram. 28. 1854. 
Stems trailing, branched at the prostrate nodes, up to 1 m. long, hirsute at the nodes, 
otherwise smooth and glabrous; leaf-sheaths tuberculate-hispid with long spreading hairs; 
blades up to 2 dm. long and 18 mm. wide, softly pubescent on both surfaces, lanceolate, 
long-acuminate, papillose-hispid with long hairs near the base; inflorescence 1-1.5 dm. long, 
the ascending racemes 3-6 cm. long, the rachis up to 5 mm. wide, the wings membranous, 
yellowish-green, the green veins anastomosing; spikelets 2.5-3 mm. long, the first scale wanting, 
the second appressed-hirsute below, ciliate on the margins with two kinds of hairs, the one 
kind stouter than the other, the third scale glabrous, the fruiting scale with a tuft of hairs at 
the acute apex. 
TYPE LOCALITY: Venezuela. ; . : 
DISTRIBUTION : Guatemala and Honduras ; also in tropical South America. 
6. Paspalum candidum (Fliigge) Kunth, Mém. Mus. 
Paris 2: 68. 1815. 
Reimaria candida Fligge, Gram, Monog. 214. 1810. 
Stems 6-8 dm. long, branched, prostrate and rooting at the lower nodes, smooth and 
glabrous; leaf-sheaths smooth and glabrous; blades glabrous or pubescent, paler beneath, 
rough on the margins, lanceolate to elliptic, acute, 4-8 cm. long and up to 2 cm. wide; inflores- 
cence 8-12 cm. long; racemes numerous, spreading or ascending, 1-2.5 cm. long, the rachis 
1.5-2.5 mm. wide; spikelets white, 2-2.5 mm. long, elliptic, obtuse, the first and second scales 
wanting, the third scale thin, hyaline, obtuse, 3-nerved, the fruiting scale the same length, 
elliptic, obtuse. 
TYPE LOCALITY: Near Puembo, Ecuador. 
DISTRIBUTION: Guatemala to Costa Rica; also from Colombia to Peru. 
7. Paspalum scabrum Scribn. Bull. U.S. Dep. Agr. 
Agrost. 4: 36. 1897, 
Stems up to 8 dm. tall, branched below, prostrate and rooting at the lower nodes, very 
rough, the nodes appressed-pubescent; leaf-sheaths very rough, ustally longer than the inter- 
nodes; blades 5-10 cm. long, 10-25 mm. wide, lanceolate, acute, papillose-hirsute, rough on 
the margins; racemes 30-50, 2-2.5 cm. long, the rachis about 2 mm. wide, rough; spikelets 
singly disposed in 1 row, white, 1.75 mm. long, obtuse, on short pubescent pedicels, the first 
and second scales wanting, the third scale thin, hyaline, 3-nerved, a little longer than the fruit- 
ing scale. 
TYPE LOCALITY: Guatemala, 
DISTRIBUTION: Guatemala. 
ILLUSTRATION: Bull. U. S. Dep. Agr. Agrost. 4: pl. 3 (as P. scabriusculum). 
8. Paspalum longicuspe Nash, sp. nov. 
An aquatic grass. Stems up to 3 dm. tall, branched below, prostrate and rooting at the 
lower nodes; leaf-sheaths loose, smooth or a little roughened, glabrous; blades up to 1.5 dm. 
long, 8-10 mm. wide, glabrous, rough, linear-lanceolate; racemes numerous, ascending, 2—4 
cm. long, whorled or scattered, the rachis very rough, extending beyond the spikelets in a 
naked point 1 cm. long or more; spikelets 2-2.5 mm. long, singly arranged in 1 row, glabrous, 
acute, the first scale wanting, the second and third scales 2-nerved, the midnerve wanting, 
