284 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
Low moist or marshy ground, southeastern United States; Ba- 
hamas; Greater Antilles. 
Bauamas: Great Bahama, Britton and Millspaugh 2736. 
Cusa: Remates, Ekman 11169. Manacas, Léon 5898. San Mar- 
cos, Léon 9203. Banao Mountains, Léon 7938. La Guanaja, Léon 
16208. Sierra de Nipe, Shafer 2999, 3001; Hkman 2647. Guara, 
Hitchcock 23404, 23415. Isla de Pinos, Britton and Wilson 15184. 
Jamaica: Bull Head Mountain, Hitchcock 9532. 
Dominican Repusuic: Moncién, Ekman 
H 12697. Constanza, Ekman H 13932, H 
14011, H 14123. San José de Ocoa, Ekman 
H 11895, H 11942. 
69. Panicum roanokense Ashe, Jour. Elisha 
Mitchell Sci. Soc. 15: 44. 1898. North 
Carolina. 
Vernal culms erect or ascending, 50 to 
Ba nH roanokense. 100 cm tall, the nodes glabrous; sheaths 
x 10 (Ashe). ' glabrous; blades flat, glabrous, 6 to 9 cm 
long, 3 to 8 mm wide; panicles 4 to 8 cm long, 
the branches spreading; spikelets 2 mm long, turgid, strongly nerved, 
glabrous. Autumnal phase erect or decumbent, branching at the mid- 
dle and upper nodes, the branches numerous but not in tufts (fig. 261). 
Open swampy woods or wet peaty meadows, southeastern United 
States; Jamaica, in open clay ground among other grasses. 
JAMAICA: Bull Head Mountain, Hitchcock 9530. 
70. Panicum caerulescens Hack.; Hitchc., Contrib. U.S. Natl. Herb. 
P29 21921909."  Hlomdat 
Vernal culms slender, 30 to 75 cm tall; blades commonly purplish 
beneath, 5 to 8 cm long, 4 to 7 mm wide; panicles 3 to 7 cm long, half 
as wide or less, the branches narrowly ascending; spikelets glabrous, 
turgid, 1.5 mm long. Autumnal phase erect or 
leaning, producing densely fascicled branches 
at the middle and upper nodes, the reduced 
blades more or less involute, the reduced pani- 
cles with a few long-pediceled spikelets (fig. 262). 
Marshes and swampy woods, southeastern 
United States and Mexico; Bahamas, Cuba. 
Bauamas: Great Bahama, Bruce 3524; Brif- Figure, 262— Panicum, caerur 
ton and Miullspaugh 2506, 2668. Andros, © let, and floret, x 10 (type). 
Brace 7015. New Providence, Britton and Brace 
597; Millspaugh 2182; Northrup 248 (all in Field Mus. Herb.); Eggers 
4305 (Hackel Herb.). 
Cusa: Cajdo, Léon 14386. Ciénaga de Zapata, Ekman 18376; Léon 
2206, 2213. Mordazo, Ekman 17035; Léon 9262; Caibarién, Léon 
489. Batabané, Léon 6152. Without locality, Wright 3463. 
71. Panicum leucothrix Nash, Bull. Torrey Bot. Club 24: 41. 1897, 
Florida. 
Vernal culms erect or ascending, appressed papillose-pilose, 25 to 
45 cm tall, the nodes pubescent; sheaths papillose-pubescent; ligule 
pilose, 3 mm long; blades rather firm, puberulent beneath, usually 
glabrous on the upper surface, 3 to 7 cm long, 3 to 7 mm wide; panicles 
3 to 8 cm long, rather densely flowered, the axis appressed-pubescent; 
