190 NORTH AMERICAN FLORA [VoLumE 17 
76. Paspalum Schreberianum (Fliigge) Nash, sp. nov. 
Paspalum virgatum Schreberianum Fligge, Gram. Monog. 190. 1810. 
Stems tufted, up to 1 m. tall or more, glabrous, simple; leaf-sheaths glabrous, except the 
ciliate margin; blades up to 7 dm. long and 12 mm. wide, linear, long-acuminate, glabrous, 
smooth, rough on the margins; racemes commonly 10-15, rarely fewer, erect or ascending, 
up to 1.5 dm. long, the rachis 1.25-1.5 mm. wide, glabrous; spikelets in pairs, 2.3-2.7 mm. 
long, 1.5-1.7 mm. wide, glabrous, elliptic to obovate, the first scale wanting, the second 5- 
nerved, the lateral nerves approximate and close to the margin, the third scale about as long 
as the first, 3-nerved, the fruiting scale yellowish, oval, about as long as the other scales. 
TYPE LOCALITY: South America. 
DISTRIBUTION: West Indies ; also in South America. 
77. Paspalum Underwoodii Nash, Bull. Torrey Club 30: 375. 1903. 
? Paspalum millegranum Schrad.; Schultes, in R. & S. Syst. Veg. Mant. 2:175. 1824. 
A tall perennial with reticulate sheaths, elongate blades, and a dense panicle. Stems 
erect, up to 12:dm. tall; leaf-sheaths glabrous, the basal ones strongly reticulate, rather 
abruptly narrowed into the blade, equitant; blades up to 7 dm. long and 1 em. wide, rough 
on the lower surface, hirsute on the upper; panicle up to 2.5 dm. long; racemes 12-18, ascend- 
ing or nearly erect, up to 10 cm. long, the rachis about 1 mm. wide and usually setiferous; 
spikelets in pairs, 2-2.5 mm. long, about 2 mm. broad, broadly obovate, yellowish-green, 
usually tinged with purple, glabrous, the first scale wanting, the second and third scales 3- 
nerved, the fruiting scale yellowish-white, oval. 
TYPE LOCALITY: Along roadsides, Mayagiiez to Joyna, Porto Rico. 
DISTRIBUTION; Jamaica and Cuba to Barbados. 
78. Paspalum conspersum Schrad.; Schultes, in R. & S. Syst. Veg. 
Mant. 2: 174. 1824. 
Paspalum virgatum conspersum Doell, in Mart. Fl. Bras. 2?: 89. 1877. 
? Paspalum cordovense Fourn. Mex. Pl. Gram. 9. 1881. 
Paspalum Hartwegianum Fourn. Mex. Pi. Gram. 12. 1881. 
Stems up to 1.5 m. tall or more, stout, glabrous, simple: lower leaf-sheaths papillose- 
hispid, the upper ones usually glabrous; blades up to 5 dm. long, the larger 2-3 cm. wide, 
fiat, rough on the margins, glabrous on the surface or hispid near the base; panicle up to 2.5 
dm. long, dense, the numerous racemes ascending or erect, the lower sometimes recurved, up 
to 1 dm. long, the rachis 0.5-0.7 mm. wide, sometimes setiferous; spikelets in pairs, 2-2.5 mm. 
long, 1.5-1.7 mm. wide, elliptic to obovate, the first scale wanting, the second and third scales 
3-nerved, the second scale appressed-pubescent, long-ciliate, the third scale glabrous, some- 
times sparsely ciliate, the fruiting scale yellowish-green, elliptic, obtuse, minutely roughened. 
TYPE LOCALITY: Brazil. . 
DISTRIBUTION: Southern Mexico and Guatemala; also in Brazil. 
79. Paspalum virgatum L. Syst. Nat. ed. 10. 855. 1759. 
? Paspalum latifolium Spreng. Syst.1: 248. 1825. 
? Paspalum platyphyllum Schultes, in R. & S. Syst. Veg. Mant. 3: 557. 1827. 
Paspalum leucochetlum Wright; Sauv. Anal. Acad. Ci. Habana 8: 203. 1871. 
Stems up to 1 m. tall or more, simple, stout, glabrous; leaf-sheaths glabrous, the lower 
ones prominently reticulate; blades up to 5 dm. long and 3 cm. wide, linear, smooth and 
glabrous; racemes 10 or more, erect or ascending, up to 1.5 dm. long, the rachis 1.25-1.5 mm. 
wide, commonly setiferous; spikelets 2.3-2.5 mm. long, 1.6-2 mm. wide, elliptic, broadly 
obovate to nearly orbicular, the first scale wanting, the second and third scales ciliate toward 
the apex, glabrous on the surface or sometimes appressed-pubescent, the second scale 5-nerved, 
the third 3-nerved, the fruiting scale becoming brown at maturity, prominently marked with 
papillae in longitudinal rows. 
TYPE LOCALITY : Jamaica. . : 
DISTRIBUTION: Southern Mexico to Costa Rica; Jamaica and Cuba to Grenada; also in trop- 
ical South America. 
ILLUSTRATIONS: Trin. Ic. p/. 271, 132; Gaertn. Fruct. pl. 80. 
