THE GRASSES OF BRITISH HONDURAS AND THE PETEN, GUATEMALA 181

thin, rounded at the base, pilose on both surfaces, mostly 2 to 6 cm. long,
8 to 14 mm. wide; racemes 3 to 5, approximate, ascending, the rachis densely
hispid-ciliate; spikelets 3 to 4 mm. long, appressed-pilose; awns slender,
1 to 1.5 cm. long, antrorsely scabrous. Open or shady places, Mexico and
the Dominican Republic to Brazil. Introduced from the Old World.
 BRITISH HONDURAS. Stann Creek District: All Pines, Schipp 783.

2. Oplismenus hirtellns (L.) Beauv. Ess. Agrost. 54, 168. 1812.
 Perennial; culms widely creeping, branching, rooting at the nodes, the
ascending fertile shoots usually 30 to 50 cm. long; blades lanceolate or
ovate-lanceolate, 3 to 10 cm. long, 1 to 2 cm. wide, glabrous; panicles 5
to 10 cm. long, with few to several ascending or spreading racemes, 1 to
2 cm. long; spikelets about 3 mm. long, the awns smooth, the awn of the
first glume 5 to 10 mm. long. Woods and shady banks, Mexico and the West
Indies to Argentina.
 BRITISu HONDURAS. Belize District: Maskall Pine Ridge, Gentle 1059.
Gracie Rock, Gentle 1573. Manatee Lagoon, Peck 349. El Cayo District:
El Cayo, Bartlett 11460. Roaring Creek, Lundell 381.
 GUATEMALA. Pet6n: Uaxactun, Bartlett 12281. La Libertad, Lundell
2357. El Paso, Lundell 1594. Monte Santa Teresa, Lundell 2706.

 41. ECHINOCHLOA Beauv.
1. Echinochloa polystachya (H.B.K.) Hitche. Contr. U. S. Nat. Herb. 22: 135. 1920.
 Perennial; culms coarse, decumbent at the base and rooting at the lower
nodes; nodes appressed-hispid; ligule densely hairy, as much as 4 mm. long;
blades flat, 30 to 40 cm. long, 1.5 to 2.5 cm. wide, the margins scabrous;
panicles about 20 cm. long, dense, the rather short branches ascending;
spikelets 5 mm. long, the sterile floret staminate, the awn 2 to 10 mm.
long. Swamps and ditches near the coast, Mexico and the West Indies to
Argentina.
 BRITISH HONDURAS. El Cayo District: Little Cocquericot, Lundell 3866.

 42. TRICHOLJENA Schrad.
1. Tricholzna rose Nees, "Cat Sem. Hort. Vratisl. a. 1836;" Fl. Afr. Austr. 17. 1841.
 Ilhsion de Seda; NATAL GRAss.
 Perennial; culms slender, 0.5 to 1 m. tall, more or less decumbent at the
base; sheaths sparsely papillose-hirsute; blades flat, 5 to 15 cm. long, 3
to 5 mm. wide; panicles rosy purple, 10 to 15 cm. long, the slender branches
narrowly ascending to almost spreading; spikelets appearing somewhat
clustered, 5 to 7 mm. long, including the hairs, on rather short, flexuous
pedicels. Open ground, Florida and the West Indies to Colombia and
Brazil. Introduced from Africa.
 GUATEMALA. Pet6n: La Libertad, Aguilar 50.

 43. SETARIA Beauv.
Bristles below each spikelet 5 or more ...--..-......-......-..-......-..---...-... 2. S. geniculata
Bristles below each spikelet rarely more than one.
 Blades 2 to 3.5 cm. wide, narrowed toward both ends; plants perennial.
 Panicles dense, spikelike; bristles below all the spikelets ........... 5. S. vulpiseta
 Panicles open, the branches long, spreading; bristles below only a
 part of the spikelets ............. 1. S. panicnlifera