180 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
Wet sandy savannas, Trinidad and Venezuela. This is the species 
described by Grisebach * as 7. hirsuta. 
TRINIDAD: Piarco Savanna, Hitchcock 10335; Broadway 5294. 
Aripo Savanna, Hitchcock 10081 (Amer. Gr. Nat. Herb. 557 ). O’Meara. 
Savanna, Britton and Hazen 1576. Without locality, Bot. Gard. 
Herb. 278 Crueger 43. 
2. Thrasya robusta Hitchc. and Chase, Contrib. U. S. Natl. Herb. 18: 
297. 1917. Trinidad, Hitchcock 10187. 
Perennial; culms erect, rather stout, branching, 1 to 1.5 m tall; 
blades flat or folded, firm, ciliate, crisp puberulent on the upper 
surface, 15 to 30 cm long, 4 to 15 mm wide, the upper reduced; 
racemes 1 (or occasionally 2), arcuate, 8 to 14 cm long, the rachis 
2 to 3 mm wide; spikelets 3.2 mm long, villous. 
Savannas, Trinidad and Colombia (‘‘Pipiral’’, southeast of Que- 
tame, Pennell 1719). 
TRINIDAD: St. Joseph, Hitchcock 10187. Piarco Savanna, Hitch- 
cock 10352. 
74. MESOSETUM Steud., Syn. Pl. Glum. 1: 118. 1854 
Inflorescence a single erect terminal spikelike raceme, the spikelets 
subsessile, solitary, in two rows on one side of a slender rachis, the 
back of the fruit turned from the rachis, ventricose on the side 
toward the rachis and fitting into its concavities, the back of the 
spikelet flat or nearly so; glumes and sterile lemma usually bearing 
stiff hairs on the strong lateral nerves, the midnerve of the sterile 
lemma faint or suppressed; fruit ventricose on the palea side. Slender 
perennials. 
Racemes 6. to 12 em long; second glume (outer one) three-fourths as long as the 
Spiele Ge Swiss Lares Daa be INE. en Le a eas ht 1. M. LoLiItrORME. 
Racemes 3 to 4 em long; second glume exceeding the spikelet__ 2. M. wriGcHrTit. 
1. Mesosetum loliiforme (Hochst.) Chase, Bot. Gaz. 51: 302. 1911. 
Panicum loluforme Hochst.; Steud., Syn. Pl. Glum. 1: 56. 1854. 
Surinam. 
Culms tufted, erect, 15 to 60 cm tall, with long leafy stolons; 
blades flat, papillose-pilose, the lower 10 to 15 em long, 1 to 4 mm 
wide, those of the stolons lanceolate, 2 to 3 cm long; spikes pale, 
long-exserted, 3 to 15 cm long; spikelets whitish, 4 mm long (fig. 115). 
Sandy pine woods, Cuba, Trinidad, and south to Brazil. 
Cusa: Pinar del Rio, Hitchcock 23256, 23267, 23280, 23307; Léon 
3469. Mangas, Hkman in 1921. Herradura, Ekman 10690, 10724; 
Tracy 9058; Hitchcock 485. Matatosa, Wright 3449. Manacas, 
Léon 5867. Baragud, Hitchcock 23374. Isla de Pinos, Britton and 
Wilson 15353; Palmer and Riley 889, 986; Curtiss 396; Taylor 31. 
TrinipAp: Piarco Savanna, Hitchcock 10336. 
2. Mesosetum wrightii Hitche., Contrib. U.S. Natl. Herb. 12: 211: 
1909. Cuba, Wright 3859. 
Culms usually decumbent at base, tufted or ascending from the 
long leafy stolons, 10 to 20 cm tall; blades flat, sparsely hispidulous, 
2 to 5 cm long, 1 to 2 mm wide, those of the stolons a little wider; 
51 Fl. Brit. W. Ind. 540. 1864. 
