THE GRASSES OF BRITISH HONDURAS AND THE PETEN, GUATEMALA 153

encloses the rest of the spikelets. Open sandy ground and waste places,
tropical America.
 BRITISH HONDURAS. Corozal District: Corozal, Gentle 139. Stann Creek
District: New Town, Schipp 898.

 11. LEPTOCHLOA Beauv.
Plants annual.
 Sheaths sparsely pilose; spikelets 1 to 2 mm. long; racemes slender 1. L. filiformis
 Sheaths glabrous or scabrous; spikelets 5 to 7 mm. long; racemes rela-
 tively thick ..,. ....... -. .... 2. L. uninervia
Plants perennial .._.. .....- ....... ...- ..... ..-.... 3. L. virgata

1. Iptochloa filiformis (Lam.) Bea-v. Ess. Agrost. 71. 166. 1812.
 Annual; culms slender to rather coarse, as much as 1 m. tall; sheaths
sparsely papillose-pilose with weak spreading hairs; blades flat, lax, thin, 5
to 15 cm. long, 3 to 5 mm. wide; inflorescence nearly half the length of the
culm with several to numerous lax, spreading racemes; spikelets minute,
the g!umes sometimes nearly as long as the spikelet. Fields and waste
places, southern United States and the West Indies to Argentina.
 GUATEMALA. Pet6n: La Libertad, Aguilar 203, 411.

2. Leptochloa uninervia (Presl) Hitchc. & Chase, Contr. U. S. Nat. Herb. 18: 383. 1917.
 Annual; culms erect, mostly 30 to 50 cm. tall, sparingly branching,
glabrous; blades often elongate, attenuate, not more than 3 mm. wide;
panicles 10 to 15 cm. long, the racemes stiff, ascending, rather densely
flowered to the base; spikelets 5 to 7 mm. long, lead-colored; lemmas obtuse,
apiculate, the lateral nerves more or less excurrent. Swamps, ditches, and
wet places, southern United States to British Honduras; Peru to Argentina.
 BRITISH HoNDURvs. Belize District: Belize, Smart 46.

3. Leptochloa virgata (L.) Beaur. Ess. Agrost. 166. 1812.
 Perennial; culms tufted, rather slender, 30 cm. to more than 1 m. tall;
blades flat, acuminate, 10 to 20 cm. long, 4 to 12 mm. wide. the margins
scabrous; sheaths glabrous; racemes numerous, somewhat aggregate, slender,
ascending to drooping, tinged with purple, mostly 6 to 10 cm. long; spikelets
2.5 to 3 mm. long, the lemmas blunt, awnless, or rarely an occasional floret
awned. Open ground, pine ridges, along stream and ditches, and in brushy
places. Florida, Mexico, and the West Indies to Argentina.
 BmRTISH HONDURAs. Corozal District: Sartaneja, Sampson 46. Orange
Walk District: Tower Hill Estate, Karling 1. Belize District: Sibun River,
Smart 70. Gracie Rock, Gentle 1570. Manatee Lagoon. Peck 296. El
Cayo District: El Cayo, Bartlett 11490. Stann Creek District: Middlesex,
Smart 37; Schipp 886. Toledo District: Colombia. Smart 45, 49.
 GUATEMALA. Peten: Uaxactun, Bartlett 12760.

 12. ELEUSINE Gaertn.
1. Eleusine indica (L.) Gacrtn. Fruct. & Sem. 1: 8. 1788.
 Annual; culms in small tough spreading clumps, somewhat decumbent at
the base, 15 to 70 cm. tall, distinctly compressed; spikes 2 to several, 5
to 10 cm. long, digitate, usually with another a short distance below; spike-
lets few to several flowered, crowded, awnless. Warm regions of both
hemispheres.