186 NORTH AMERICAN FLORA [VotumeE 17 
or less narrowed toward the base, ascending, flat, rather thin, the upper surface with some long 
hairs at the very base and a few scattered ones elsewhere, sparingly ciliate, the lower surface 
glabrous; racemes 1 or 2, slender, erect, about 2 cm. long; spikelets in pairs, elliptic, 1.8 mm. 
long and 0.7 mm., wide, usually purplish-tinged, glabrous, the first scale wanting, the second and 
third scales 3-nerved, the fruiting scale gr eenish-white, a little shorter than the outer scales, 
obtuse. 
TYPE LOCALITY: Between Aibonito and Cayay, Porto Rico. 
DISTRIBUTION : Known only from the type locality. 
60, Paspalum maculatum Nash, sp. nov. 
Stems tufted, up to 4 dm. tall, slender, sometimes branched below, glabrous; leaf-sheaths 
glabrous or sparingly hirsute; blades up to 1.5 dm. long, 1-2 mm. wide, erect, glabrous, usually 
folded; racemes 2-4, curved, 2-4 cm. long, the rachis about 0.25 mm. wide; spikelets in pairs, 
0.8 nim. long, 0.5 mm. wide, obovate, glabrous, the first scale wanting, the second 3-nerved, 
a little shorter than the spikelet, the third scale 5-nerved, as long as the spikelet, the apex 
black-tipped, the fruiting scale yellowish, strongly papillate longitudinally. 
Type collected on the savannas of Boruca, Costa Rica, November, 1891, Pittier 4474 (herb. John 
Donnell Smith, in herb. U. S. Dep. Agr.). 
DISTRIBUTION: Known only from the type locality. 
61. Paspalum microstachyum J. Presl, in Presl, Rel. Haenk. 1: 215. 1830. 
Stems wp to 1 m. tall, erect or ascending, with leafless flower-bearing branches from the 
supper axils; leaf-sheaths glabrous or pubescent; blades up to 2.5 dm. long, 2.5 cm. wide, long- 
‘acuminate, the basal and those on the lower part of the stem long-attenuate at the base, 
‘passing bya broader base into the upper ones which are deeply cordate-clasping and lanceo- 
‘late, all flat, glabrous or sparingly hirsute, often ciliate; racemes numerous, occasionally only 8- 
10, spreading, slender, often curved, the larger up to 8 cm. long, the rachis about 0.7 mm. wide; 
spikelets in pairs, 1.5 mm. long and about 0.7 mm. wide, pubescent, one on a short pedicel, 
the other on a pedicel about as long as itself, the first scale wanting, the second and third scales 
5-nerved, the fruiting scale yellowish, smooth. 
TYPE LOCALITY: Not indicated. . . . 
DISTRIBUTION: Guatemala to Costa Rica; also in Colombia. 
62. Paspalum caespitosum Fliigge, Gram. Monog. 161. 1810. 
Paspalum gracile Poir. in lam. Encyc. Suppl. 4: 313. 1816. Not P. gracile Rudge, 1805. 
Paspalum heterophylium Poir. in Lam. Encyc. Suppl. 4: 315. 1816. 
Paspalum Poiretii R. & S. Syst. Veg. 2: 878. 1817. 
Paspalum lanceaefolium Desv. Opusc. 58. 1831. 
? Paspalum Richardi Steud. Syn. Gram. 17. 1854. 
Paspalum Blodgettiit Chapm. Fl. S. U. S. 571. 1860. 
Paspalum caespitosum longifolium Vasey, Bull. Torrey Club 13: 164. 1886. 
A slender tufted perennial, with flat glabrous leaf-blades and pubescent spikelets. Stems 
3-6 dm. tall, slender; leaf-sheaths smooth and glabrous; blades 5-20 cm. long, 3-7 mm. wide, 
narrowed at both ends, linear, erect or nearly so, flat, glabrous; racemes 2-6, erect, 1.5-5 cm. 
long, slender, the rachis about 0.5 mm. wide; spikelets in pairs, 1.5-1.8 mm. long and about 
0.8 mm. wide, elliptic, the first scale wanting, the second and third scales sparsely papillose- 
pubescent with appressed hairs, 3-nerved, the fruiting scale yellowish-white. 
TPE LOCALITY: Hispaniola. ; . 
DISTRIBUTION : Southern Florida and Bahamas to Jamaica, Cuba, Hispaniola, and Porto Rico. 
ILLUSTRATIONS: Bull. U. S. Dep. Agr. Agrost. 17: 7. 332, Trin. Ic. pl. 122. 
63. Paspalum Helleri Nash, Bull. Torrey Club 30: 376. 1903. 
Paspalum elatum Nash, in Small, Fl. SE. U. S. 73. 1903. Not P. elatum Rich. 1877. 
A tufted perennial. Stems up to 8 dm. tall, often with leafless flower-bearing branches 
from the upper axils, smooth and glabrous; sheaths smooth and glabrous; blades up to 
3 dm. long, 5-8 mm. wide, linear, often involute, smooth and glabrous, or with a few long 
hairs on the upper surface just back of the ligule; racemes 2-6, rarely single on the branches, 
slender, 6-13 cm. long, the rachis about 1 mm. wide; spikelets in pairs, 1.5—2 mm. long, 0.8-1.3 
