818 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
49. Paspalum reptatum sp. nov. 
Perennial, cespitose; culms compressed, creeping, as much as 1 meter long, 
rooting at the nodes, bearing erect or ascending leafy, often fascicled branches, 
10 to 30 cm. long; sheaths compressed, the lower mostly velvety-pubescent, the 
upper usually glabrous except for a puberulent band at the summit, this some- 
times wanting, commonly loose and separating from the culm; ligule minute, 
membranaceous ; blades flat, spreading, 3 to 10 cm. long, 2 to 5 mm. wide, rounded 
at the base, velvety-pubescent to glabrous; racemes 2 or 3, commonly overtopped 
by the upper leaf, 5 to 10 mm, apart on a slender flattened glabrous axis, diver- 
gent or somewhat reflexed, 1 to 3.5 cm. long; rachis pubescent at the naked base, 
otherwise glabrous, the midnerve raised into a prominent ridge between the 
two rows of spikelets; spikelets solitary, not imbricate, yellowish green, 
blotched with brown, pubescent, 1.5 to 1.7 mm. long, 1.2 mm. wide, obovate, 
blunt, the glumes and sterile lemma equal; fruit stramineous, very minutely 
roughened. 
Type in the U. S. National Herbarium, no. 865563, collected in wet ground in 
savannas west of Manacas, Province of Santa Clara, Cuba, by Brother Leén 
and F. R. Cazanas, December 28, 1915 (no. 5850). Known only from the type 
collection. 
This species is most nearly related to Paspalum orbiculatum, from which it is 
distinguished by its larger pubescent spikelets, as well as by its larger size, 
more or less pubescent foliage, and longer narrower blades. 
50. Paspalum conjugatum Bergius, Act. Helv. Phys. Math. 7: 129. 1762. 
An extensively creeping perennial with compressed culms, the suberect flower- 
ing branches sometimes 1 meter tall; blades flat, rather thin, up to 20 cm. 
long, commonly about 8 mm, wide; racemes a pair (rarely a third below), 
widely divaricate, usually arcuate, slender, commonly 10 to 12 em. long, the 
pale yellow flattened imbricate spikelets about 1.5 mm. long, with scant long 
silky hairs around the margin. 
Moist ground, Gulf States to South America; Tropics and Subtropics 
of both hemispheres; throughout the West Indies; one of the commonest 
grasses of moist savannas and ditch banks, forming extensive and close mats, 
Originally described from Dutch Guiana. This species is said by C. F. Baker 
and by Pére Duss to be an excellent forage grass. Maza and Roig’ state that 
it is eaten by cattle only when they are driven to it by hunger. The common 
name “sour-grass,” given to this species by Grisebach, would indicate that it 
was unpalatable. In Cuba it is called “cafiamazo” and “cafiamazo hembro.” 
50a. Paspalum conjugatum pubescens Doell in Mart. Fl. Bras. 2’: 55, 1877, 
On the average coarser than the preceding, the blades somewhat firmer, 
pubescent ; spikelets 2 mm. long, the silky hairs more copious. 
Moist savannas and banks, South America. In the West Indies found in 
Grenada only (Broadway in 1904). Originally described from Brazil. 
PASPALUM DILATATUM Poir. In the herbarium of the New York Botanical 
Garden there is a specimen of this species from “lawn, Agr. Sta.,”” Bermuda 
(Brown, Britton & Bisset 2005). This is a tall grass with flat ovate ciliate 
spikelets, often cultivated in the Subtropics under the name of “ water-grass.” 
51. Paspalum fasciculatum Willd. in Fliigge, Monogr. Pasp. 69. 1810. 
A large, extensively creeping perennial, the compressed culms as much as 
1 cm. wide and several meters long, the bases forming a tangled mass, the 
erect flowering culms 1 to 2 meters tall; sheaths densely silky-ciliate, at least 
1st. Exp. Agron. Bol, 22: 57. 1914. 
