BOTANY OF THE MAYA AREA


racemes becoming conspicuously flexuous or tortuous, 2 to 3 cm. long, usually
partly enclosed in the short, narrow spathes; spikelets about 3.5 mm. long,
the awns delicate, geniculate, 1 cm. long. Open ground, Mexico and the
West Indies to Argentina.
 BRITISH HONDURAS. Belize District: Manatee Lagoon, Peck 59. El Cayo
District: Duck Run, Bartlett 11528.
 GUATEMALA. Peten: Kantetul, Lundell 3169. La Libertad, Lundell 2374.

4. Andropogon rirgatua Desv.; Hamilt. Prodr. P1. Ind. Occ. 9. 1825.
 Perennial; culms tufted, relatively slender, 1 to 2 m. tall; sheaths much
shorter than the internodes; blades flat or loosely rolled, rather firm, 10
to 20 cm. long, 2 to 4 mm. wide, more or less villous on the upper surface
at the base; inflorescence narrow, dense, not silky, the branchlets numerous,
crowded; racemes solitary, few-flowered, partly enclosed in the short, com-
paratively broad spathes, 1 cm. long; spikelets 3 to 4 mm. long, awnless.
Open wet prairies, British Honduras and the West Indies to Brazil.
 BRITISH HONDURAS. Belize District: Manatee Lagoon, Peck 54. Belize,
Bartlett 11237. El Cayo District: Mountain Pine Ridge, Bartlett 11611,
11781.
5. Andropogon virginicus L. Sp. Pl. 1046. 1753.
 Perennial; culms densely tufted, 1 to 1.5 m. tall; lower leaves crowded in
a conspicuous basal cluster, the sheaths flattened, keeled, the blades elongate,
2 to 4 mm. wide; upper sheaths much shorter than the internodes; in-
florescence nearly half the length of the culm; racemes usually paired,
slender, flexuous, more or less included in the broad, rather conspicuous
spathes; rachis and pedicels villous; sessile spikelet 3 to 4 mm. long, the
awn straight, delicate, 1 to 1.5 cm. long. Open ground, southern United
States to Panama and the West Indies.
 BRITISH HONDUAIS. Belize District: Manatee Lagoon, Peck 150.

6. Andropogon glomeratus (Walt.) B.S.P. Prel. Cat. N. Y. 67. 1888.
 Perennial; culms in dense clumps, erect, 0.5 to 1.5 m. tall; lower sheaths
 broad, keeled, much overlapping, usually pilose at least on the margins;
 blades firm, flat or folded, linear, 3 to 5 mm. wide; inflorescence dense, plume-
 like; racemes in pairs, slender, flexuous, 1.5 to 3 cm. long, villous; spikelets
 3 to 4 mm. long, the awns delicate, straight, about 15 mm. long. Open often
 wet ground, southern United States and the West Indies to northern South
 America.
 BRiTIsH HONDURAS. Corozal District: Corozal, Gentle 107, 134. Corozal-
 Orange Walk road, Lundell 4902. Orange Walk District: Honey Camp,
 Lundell 428. Tower Hill Estate, Karling 55.
 GUATEMALA. Peten: La Libertad, Lundell 2482, 3482.

 7. Andropogon bicornis L. Sp. PI. 1046. 1753. Zacaton.
 Perennial, usually coarse; culms tufted, erect, 1 to 2 m. tall; blades firm,
 elongate, 2 to 5 mm. wide, the margins serrate; inflorescence large, com-
 pound, the numerous branches crowded, forming a white or tawny plume;
 racemes paired, 2 to 3 cm. long, slender, flexuous, on long, slender peduncles,
 the spathes inconspicuous; spikelets about 2.5 mm. long, awnless. Open
 hillsides, swamps, and grassy places, southern Mexico and the West Indies
 to Argentina.