THE GRASSES OF BRITISH HONDURAS AND THE PETEN, GUATEMALA 151

1. Sporobolus littoralis (Lam.) Kunth, R6v. Gram. 1: 68. 1829.
 Perennial; culms erect from widely creeping rhizomes, 50 to 70 cm. tall;
blades distichous, flat at the base, involute pointed, usually not more than
10 cm. long; panicles spikelike, usually 6 to 10 cm. long, 0.5 to 1 cm. thick;
spikelets 2.5 to 3 mm. long, the glumes acute, subequal, as long as the
florets. Salt marshes and sandy seacoasts, southern Florida to Brazil.
 BRITISH HONDURAS. Belize District: Manatee Lagoon, Peck 120. Stann
 Creek District: South Water Cay, Sampson 27.

2. Sporobolue cnbensis Hitchc. Contr. U. S. Nat. Herb. 12: 237. 1909.
 Perennial; culms densely tufted, erect, 30 to 60 cm. tall; lower sheaths
crowded, dark brown, the margins densely felty-ciliate; blades flat or folded,
mostly 10 to 20 cm. long, 2 to 4 mm. wide, tapering toward the base, nar-
rower than the mouth of the sheath; panicles open, the short spreading
branches whorled; spikelets 3 to 4 mm. long, the first glume half as long.
Savannas, rocky slopes and pine ridges, British Honduras and the West
Indies to Venezuela.
 BRITISH HONDURAS. Belize District: Gracie Rock Pine Ridge, Gentle
1549. El Cayo District: Mountain Pine Ridge, Bartlett 11745. Toledo
District: Ycacos Lagoon, Peck 694.

3. Sporobolus buckleyi Vasey, Bull. Torrey Club 10: 128. 1883.
 Perennial, culms erect, 40 to 130 cm. tall; sheaths compressed, keeled,
densely hairy on the collar; blades flat, 15 to 45 cm. long, 5 to 10 mm.
wide, glabrous, the margins scabrous; panicles diffuse, as much as 50 cm.
long, the slender drooping branches naked below; spikelets 1.4 mm. long.
Moist woods, southern Texas, eastern Mexico and British Honduras.
 BRITISH HONDURAs. Corozal District: Corozal, Lundell 4796. Orange
Walk District: Honey Camp, Lundell 359.

4. Sporobolus indicus (L.) R. Br. Prodr. Fl. Nov. Holl. 170. 1810.
 Perennial; culms in tough dense clumps about 1 m. tall; blades flexuous,
attenuate to a very fine point; panicles narrow, 15 to 30 cm. long, the
slender branches ascending; spikelets 1.8 mm. long, subsecund on the lower
side of the branches. Open ground and waste places, Mexico and the West
Indies to Colombia and Brazil.
 BRITISH HONDURAS. Belize District: Belize, Lundell 3780. Gracie Rock,
Gentle 1624.
 9. ARISTIDA L.
Plants annual; culms not more than 25 cm. tall ._- 2. A. capillacea
Plants perennial; culms mostly 0.5 to 1 m. tall.
 Panicles dense, contracted; awns loosely spiral .____ .-3. A recurvata
 Panicles open, at least toward the base; awns straight or arcuate.
 Panicle branches floriferous to the base; lateral awns well
 developed -...--..........--... .-- ..-... ... ...... 4. A. orizabensis
 Panicle branches naked below; lateral awns minute ....1. A. ternipes

1. Aristida ternipes Cav. Icon. Pl. 5: 46. 1799.
 Perennial; culms tufted, erect, 50 to 100 cm. tall; blades flat, elongate,
involute toward the tip, tapering into a fine point; panicles large, drooping,
1/3 to 1/2 the length of the culm, the branches naked below; spikelets ap-