'AE GRASSES OF BRITISH HONDURAS AND THE PETESN GUATEMALA 183

 BRITISH HONDURAS. Corozal District: San Andres, Lundell 4853. Santa
Rita, Lundell 4939.

5. Stearia vulpisela (Lam.) Roem. & Schult. Syst. Veg. 2: 495. 1817.
 Perennial; culms coarse, tufted, as much as 2 m. tall; blades often 50 cm.
long, 2 to 3.5 cm. wide, narrowed to both ends, the margins scabrous; pani-
cles 15 to 30 cm. long, the axis densely villous; spikelets 2.5 mm. long, the
fertile lemma coarsely rugose. Open or brushy places, southern Mexico
and the West Indies to Peru and Argentina.
 BRITISH HONDURAS. Corozal District: Without locality, Gentle 507. El
Cayo District: El Cayo, Bartlett 12953. Stann Creek District: Stann Creek,
Schipp 373.
 44. PENNISETUM L.
1. Pennisetum nervosum (Nees) Trin. Mem. Acad. St. P6tersb. VI. Sci. Nat. 1: 177. 1834.
 Perennial; culms usually in clumps, decumbent at the base, 2 to 3 m.
tall; blades elongate, scabrous, 8 to 15 mm. wide; panicles dense, flexuous
at maturity, 12 to 20 cm. long, 12 to 15 mm. thick; spikelets solitary, sessile,
6 to 7 mm. long; bristles slender, scabrous, unequal, 12 to 15 mm. long.
Open or brushy ground, British Honduras; Ecuador and Brazil to Argentina.
 BRITISH HONDURAS. El Cayo District: Little Cocquericot, Lundell 3867.

 45. CENCHRUS L.
Burs not more than 4 mm. wide, densely crowded in a long spike; first
 glume obsolete ... .__... __. ....._....... ...__.._.....- ......._... .... 1. C. brownii
Burs 5 to 7 mm. wide, not crowded; first glume present-.......- .....-....... 2. C. echinatus

1. Cenchras brownii Roem. & Schult. Syst. Veg. 2: 258. 1817. Based on C. inflexus
 R. Br., not Poir. 1804.
 Cenchrus viridis Spreng. Syst. Veg. 1: 301. 1825.
 Annual; culms decumbent at the base and rooting at the lower nodes, 0.5
to 1 m. tall; sheaths compressed keeled; blades flat, thin, 10 to 30 cm.
long, mostly 6 to 8 mm. wide; spikes 4 to 10 cm. long, dense; burs sub-
globose, 4 mm. wide, pubescent, the lobes interlocking, usually bearing 3
spikelets. Open ground and waste places, Florida, Mexico, and the West
Indies to Bolivia and Brazil.
 GUATEMALA. Petdn: El Paso, Lundell 1541.

2. Cenchrus echinatus L. Sp. P1. 1050. 1753. Bun-Bnn.
 Annual; culms decumbent spreading, usually 30 to 50 cm., sometimes
as much as 1 m. long, compressed, glabrous; blades flat, more or less pilose;
spikes 3 to 10 cm. long; burs scarcely crowded, pubescent, the lobes com-
paratively slender, not interlocking; spikelets 2 to 4 in each bur. Open
ground and waste places, southern United States and the West Indies to
Argentina.
 BRITISH HONDURAs. Corozal District: Corozal, Lundell 4733. San
Andres, Gentle 5. Without locality, Gentle 280. Belize District: Belize,
Gentle 52. Stann Creek District: Middlesex, Schipp 893.

 46. OLYRA L.
Fertile lemma silky villous at the base and on the margins ... ... 1. 0. yucatana
Fertile lemma glabrous ............ .---.. ......_.. .. .......... ....... 2. 0. latifolia