GENERA OF GRASSES OF THE UNITED STATES. 
225 
it may be utilized as a lawn grass. For this purpose it is propa- 
gated by setting out pieces of the stolons. It soon spreads and 
occupies the space between. 
A second species of the genus, A. fwcatus (Fliigge) Hitchc, is 
found over about the same range as the preceding, but confined to 
the United States. This is infrequent and is usually of no economic 
importance, but is a valuable pasture grass in the Kissimmee region, 
Fla. It is distinguished by its larger spikelets, 4 to 6 mm. long. 
116. Reimarochloa Hitchc. 
(Reimaria of authors.) 
Spikelets strongly dorsally compressed, lanceolate, acuminate, 
rather distant, subsessile, and alternate in two rows along one side 
of a narrow, flattened rachis, the back of the fertile lemma turned 
toward it; both glumes wanting, or the second sometimes present in 
the terminal spikelet; sterile lemma about equaling the fruit, the 
sterile palea obsolete ; fertile lemma scarcely indurate, faintly nerved, 
acuminate, the margins inrolled at the base only, the palea free nearly 
half its length. 
Spreading or stoloniferous perennials, with flat blades and slender 
spikes, these subdigitate or racemose along the upper part of the culm, 
stiffly spreading or reflexed at maturity. Species about four ; in the 
American Tropics, one extending into Florida. 
Type species : Reimaria acuta Fliigge. 
Reimarochloa Hitchc, Contr. U. S. Nat. Herb. 12: 198. 1909. The type is 
designated. The genus includes most of the species that have been assigned to 
Reimaria Fliigge, the type of which is R. Candida, a species of Paspalum. 
Only one species is found in the United States, Reimarochloa 
oligostachya (Munro) Hitchc. (fig. 136), confined to Florida and 
Cuba. It has no economic importance. 
117. Paspalum L. 
Spikelets plano-convex, usually obtuse, subsessile, solitary or in 
pairs, in two rows on one side of a narrow or dilated rachis, the back 
of the fertile lemma toward it ; first glume usually wanting ; second 
glume and sterile lemma commonly about equal, the former rarely 
wanting; fertile lemma usually obtuse, chartaceous-indurate, the 
margins inrolled. 
Mostly perennials, with one to many spikelike racemes, these single 
or paired at the summit of the culms or racemosely arranged along 
the main axis. Species numerous, probably as many as 200, widely 
distributed in the warmer parts of both hemispheres; about 50 spe- 
cies in the United States, mostly in the Southeastern States. 
Type species: Paspalum dimidiatum L. 
Paspalum L., Syst. Nat. ed. 10, 2 : 855, 1759. Four species are described, P. di- 
midiatum (of which " Panicum dissectum sp. pi. 57 n. 6" is cited as a syno- 
97769°— 19— Bull. 772—15 
