THE GRASSES OF BRITISH HONDURAS AND THE PETEN, GUATEMALA 185

 somewhat spreading. Meadows and open grassland, Mexico and the West
 Indies to Brazil and Chile.
 GUATEMALA. Pet6n: Kantetul, Lundell 3167.

 49. SACCHARUM L.
1. Saccharuin officinarum L. Sp. PI. 54. 1753. SucGARANE.
 Perennial; culms stout, tall, short-jointed, with broad blades and large
feathery panicles. Cultivated throughout tropical regions.

 50. ANDROPOGON L.
Racemes solitary on each peduncle.
 Annual; culms widely spreading .....-..--_. ..__- .._._1. A. brevifolius
 Perennial; culms csespitose, erect
 Spikelets awned; racemes 2 to 8 cm. long.
 Racemes few, straight, not conspicuously villous .. .. 2. A. semiberbis
 Racemes numerous, flexuous, villous, crowded in a dense
 plumelike inflorescence .....-.. ....... ..... ................ .....3. A. condensatus
 Spikelets awnless; racemes about 1 cm. long ....-.. 4. A. virgatus
Racemes 2 to 5 on each peduncle.
 Racemes numerous, aggregate (except in A. virginicus) in a dense
 plumelike inflorescence.
 Spikelets awned.
 Racemes much shorter than the spathes; inflorescence open....5. A. virginicus
 Racemes usually exceeding the spathes; inflorescence dense.. 6. A. glomeratus
 Spikelets awnless _-. ..... ................ ...- .. .. ......- 7. A. bicornis
 Racemes few, not aggregate.
 Ligule 2 mm. long; tips of the blades acute. ...._ ...... 8. A. leueostachyus
 Ligule less than 1 mm. long; tips of the blades boat-shaped 9. A. selloanus

1. Andropogon brevifolius Swartz, Prodr. Veg. Ind. Occ. 26. 1788.
 Annual; culms slender, compressed, freely branching, widely creeping,
6 cm. to more than 1 m. long; blades flat, abruptly pointed, 1 to 5 cm. long,
1 to 4 mm. wide; racemes solitary, 1 to 2 cm. long; spikelets 3 mm. long,
scabrous, the awns about 1 cm. long, geniculate, tightly twisted below the
bend. Brushy slopes, banks and open ground, tropical regions of both
hemispheres.
 BRITISH HONDURAS. El Cayo District: Mountain Pine Ridge, Bartlett
11826.

2. Andropogon semiberbis (Nees) Kunth, Rev. Gram. 1: Suppl. XXXIX. 1830.
 Perennial; culms tufted, erect 0.5 to 1.5 m. tall; blades flat, acute, 10 to
20 cm. long, 2 to 5 mm. wide; racemes solitary, few, erect, 4 to 8 cm. long;
rachis and sterile pedicel ciliate toward the summit; sessile spikelet 5 to
6 mm. long, the first glume glabrous; awn 1 cm. long, geniculate, twisted
below. Dry or rocky hills and plains, Florida, eastern Mexico and the West
Indies to Argentina.
 BRITISH HONDURAS. Belize District: Manatee Lagoon, Peck 282. El
Cayo District: Mountain Pine Ridge, Bartlett 11695.

3. Andropogon condensatus HB1.K. Nov. Gen. & Sp. 1: 188. 1816.
 Perennial; culms densely tufted, erect, 1 to 1.5 m. tall; blades rather firm,
15 to 25 cm. long, 3 to 10 mm. (usually about 5 mm.) wide; inflorescence
15 to 40 cm. long, the branches aggregate, appressed to somewhat spreading;