THE GRASSES OF BRITISH HONDURAS AND THE PETEN, GUATEMALA 187

 BRITISH HONDURAS. Stann Creek District: Middlesex, Smart 25. All
Pines, Schipp 654.
 GUATEMALA. Pet6n: Lake Zotz, Lundell 3316. La Libertad, Aguilar 268.
8. Andropogon lencostachyus IHB.K. Nov. Gen. & Sp. 1: 187. 1816.
 Perennial; culms slender, densely tufted, erect, 25 to 70 cm. tall; lower
sheaths crowded, flattened, keeled; blades usually flat, I to 3 mm. wide
(mostly 2 mm.), acute; racemes densely villous, usually paired, (some-
times 3), the pairs scattered, the slender peduncles long-exserted, the spathes
small, inconspicuous; spikelets 3 mm. long, awnless, obscured by the long
silky hairs. Open usually dry fields, hillsides, and pine ridges, southern
Mexico and the West Indies to Argentina.
 BRITISH HONDURAS. Belize District: Belize River, Smart 36. Manatee
Lagoon, Peck 116.
 GUATEMALA. Pet6n: La Libertad, Lundell 2396.
9. Andropogon selloanus (Hack.) Hack. Bull. Herb. Boiss. II. 4: 266. 1904.
 Resembling A. leucostachyus; blades rather short, 3 to 5 mm. wide; the
tips boat-shaped; ligule short; racemes 3 to 5, rather more densely villous,
tawny. Dry wooded hills and open banks, British Honduras and the West
Indies to Paraguay.
 BRITISH HONDURAS. Belize District: Baker's Pine Ridge, Lundell 3788.
 GuATEMALA. Pet6n: Sabana Zotz, Lundell 3596.
 51. CYMBOPOGON Spreng.
1. Cymbopogon citratus (DC.) Stapf. Kew Bull. Misc. Inf. 1906: 322. 1906. Te de
 Limon, LEMON GRASS.
 Perennial; culms in dense clumps with numerous leafy sterile shoots;
blades elongate, 5 to 15 mm. wide, scabrous on the margins. Not known to
flower in America. Introduced from the Old World, and commonly planted
for its strong lemon scent.
 GUATEMALA. Pet6n: La Libertad, Aguilar 42.

 52. HYPARRHENIA Anderss.
 1. Hyparrhenia rufa (Nees) Stapf in Prain, Fl. Trop. Afr. 9: 304. 1918.
 Perennial; culms erect, usually in small clumps, 1 to 2.5 m. tall; blades
 flat, linear, mostly 2 to 5 mm. wide; racemes paired, 2 to 3 cm. long, nu-
 merous, the peduncles slender. flexuous, long-exserted; rachis joints and the
 pedicel of the sterile spikelet pilose on the margins with rufous hairs;
 spikelets 4 mm. long, the glumes more or less pilose; pedicellate spikelet
 awnless, the sessile with a twice geniculate awn about 15 mm. long. Moist
 open ground in tropical regions, Guatemala to Brazil and Venezuela. Intro-
 duced from Africa.
 GUATEMALA. Pet&n: La Libertad, Aguilar 240.
 53. SORGHUM Moench
 1. Sorghum,.vulgare Pers. Syn. P1. 1: 101. 1805. Maicillo; SoRaGHM.
 Annual; culms coarse, with broad, flat, smooth blades, and dense heavy
 panicles. Warm regions of both hemispheres. Sometimes cultivated for
 forage and the seeds for human food. Commonly used "para hacer dulces
 y atolillos." Warm regions of both hemispheres.
 GUATEMALA. Pet6n: La Libertad, Aguilar 35, 90.