THE GRASSES OF BRITISH HONDURAS AND THE PETEN, GUATEMALA 165

racemes 2, conjugate, widely spreading, as much as 15 cm. long; spikelets
solitary, 1.4 to 1.8 mm. long, ovate, minutely pointed, the margins silky-
ciliate. Common weed, roadsides, waste ground along rivers and ditches
and in cultivated fields, Florida to Texas, Mexico and the West Indies to
Argentina.
 BRITISH HONDURAS. Corozal District: Corozal, Lundell 4940. Stann
Creek District: Big Creek, Schipp 895. Toledo District: Temash River,
Schipp 1369. Punta Gorda, Smart 52.
 GUATEMALA. Petin: La Libertad, Aguilar 141.

12a. Paspalum conjugarnm var. pubescens Doell in Mart. Fl. Bras. 2': 55. 1877.
 Differing from the species in having papillose-pubescent blades, usually
longer racemes, and larger more ciliate spikelets as much as 2.2 mm long.
Waste ground, Mexico and the West Indies to Brazil.
 BarTISH HONDURAS. Corozal District: Corozal, Lundell 4940. Belize
District: Gracie Rock, Gentle 1603.

13. Paspalum virgatum L. Syst. Nat. ed. 10. 2: 855. 1759.
 Perennial; culms very coarse, in large dense clumps, simple, 1 to 2 m.
tall; lower sheaths purple, spongy, reticulate; blades firm, flat, 30 to 75 cm.
long, mostly 1 to 2 cm. wide, the margins serrulate; racemes usually 10 to
16, ascending to drooping, the lowermost usually 10 to 15 cm. long; spikelets
inhpairs, crowded, obovate, abruptly pointed, 2.5 to 3 mm. long, pubescent,
especially at the summit; fruit chestnut brown. papillose striate. Open
swampy ground, southern Texas and the West Indies to Brazil.
 BRITISH HONDURAS. Corozal District: Corozal, Lundell 4957. Belize
District: Belize, Lundell 1910. Northern River, Gentle 891. Stann Creek
DistriFt: Big Creek, Schipp 883.

14. Paspalnm conspersum Schrad.; Schult. Mant. 2: 174. 1817.
 Perennial; culms erect in dense clumps, resembling P. virgatum; panicles
erect, 15 to 25 cm. long, of 6 to 16 ascending to spreading or drooping
racemes, 7 to 15 cm. long; margin of rachis scaberulous but with no long
hairs; spikelets 2.7 to 3 mm. long, deep purple to rusty brown, usually softly
pubescent; fruit chestnut-brown, papillose striate. Open, moist ground and
along streams, Mexico to Argentina.
 BRITISH HoTDmRAS. Belize District: Manatee Lagoon, Peck 69a. This
specimen is exceptional in having glabrous spikelets.

15. Paspalum millegrana Schrad. in Schult. Mant. 2: 175. 1824.
 Perennial; culms erect or ascending in large tough clumps, 1 to 2 m. tall,
glabrous; lower leaves crowded toward the base; blades firm, flat. folded
at the base, loosely rolled in drying, mostly 30 to 75 cm. long, 7 to 15 mm.
wide. pubescent or glabrous above, scabrous beneath, the margins sharply
serrulate; racemes several to many, approximate or somewhat distant,
ascending or spreading, mostly 8 to 12 cm. long; spikelets in pairs, obovate,
2 to 2.4 mm. long, glabrous. Moist open ground, swamps and along ditches,
British Honduras and the West Indies to southern Brazil.
 BRITISH HONDURAS. Belize District: Belize, Lundell 3782. Manatee
Lagoon, Peck 69.