MANUAL OF THE GRASSES OF THE WEST INDIES A415 
Dominican ReEpusuic: Moncién, Hkman H 12686. <Azua, Rose 
3826. Barahona, Fuertes 1455b. Los Charcos, Fuertes 1418. San- 
tiago, Hkman H 16225. 
VirGiIn Isuanps: Virgin Gorda, Fishlock 208. 
LeEwarp Isianps: St. Kitts, Box 154. Antigua, Wullschlagel; 
Box 71. Guadeloupe, Duss 3137; Stehlé 286. 
2. Heteropogon melanocarpus (Ell.) Benth., Jour. Linn. Soc. Bot. 
Ole S82: SWEET TANGLEHEAD. 
Andropogon melanocarpus Ell., Bot. S. C. and Ga. 1: 146. 1816. 
Georgia. 
Culms stout, often glaucous, the lower nodes often producing stilt- 
roots; blades as much as 1 cm wide; racemes several, combined with 
the spathes and upper leaves forming 
a rather dense inflorescence 20 to 30 
cm long; first glume of staminate 
spikelet 15 mm long; mature fertile 
spikelet terete, dark brown, 6 to 7 mm 
long with a sharp bearded callus about 
2 mm long; awn hispidulous, 6 to 10 
em long (fig. 365). 
Grassy slopes and open ground, 
southern United States to Brazil and 
Bolivia; Haiti; also Tropics of the 
Old World. 
Haiti: Pétionville, Ekman H 1909. 
115. TRACHYPOGON Nees, Agrost. 
Bras= 341i. 1829 
Spikelets in pairs, along a slender 
continuous rachis, one nearly sessile, 
staminate, awnless, the other pedicel- 
late, perfect, long-awned; the pedicel 
of the perfect spikelet obliquely dis- 
articulating near the base, forming a 
sharp barbed callus below the spike- 
let; first glume firm-membranaceous, 
rounded onthe back, several-nerved, PSV > 30 ent ee 
obtuse; second glume firm, obscurely 
nerved; fertile lemma narrow, extending into a stout twisted and bent 
or flexuous awn; sessile spikelet persistent, as large as the fertile spike- 
let and similar but awnless. Perennial, moderately tall grasses, with 
terminal spikelike racemes, these single or clustered. 
Awig!0) bo,127em long, conspicuously plumose__._._..__-_____- i  GOUrNI: 
Awn mostly not more than 5 cm long, appressed-plumose on the lower part, 
scabrous above. 
Blades flat; racemes usually 2 or 3, sometimes solitary__2. T. LIGULARIS. 
Blades involute; racemes usually solitary____-_--__-----_- 3. TL. FILIFOLIUS. 
1. Trachypogon gouinii Fourn., Mex. Pl. 2: 66. 1886. Vera Cruz, 
Mexico. 
Tall slender glabrous perennial, sparingly producing scaly rhizomes; 
culms simple, usually geniculate below; blades involute; raceme 
narrow, pale, feathery, 15 to 30 cm long. 
60256—36—27 
