284 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Savannas and open ground, West Indies to Paraguay. The type specimen 
collected in Brazil by Sello. 
Cuba (Pinar del Rio and Isle of Pines), Trinidad (Pitch Lake and St. Jo- 
seph), and Tobago. 
22. Andropogon nashianus Hitche. Contr. U. 8S. Nat. Herb. 12: 193. 1909. 
A slender erect perennial with narrow folded blades and terminal, densely 
silky racemes on long naked peduncles. 
Sandy barrens, western Cuba and Antigua, the type specimen collected by 
Wright (no. 3899) in Pinar del Rio, Cuba. 
23. Andropogon urbanianus Hitche. Bot. Gaz. 54: 424. 1912. 
Taller than the preceding with long involute blades and grayish tawny 
racemes with dark spathes loosely scattered along the upper third of the culm, 
the pedicellate spikelets nearly as long as the fertile ones. 
Dry hills, Hispaniola, the type specimen being fwertes 1420. 
Haiti (Camache, Buch 961, 1074) and Santo Domingo (Salinas, Fuertes 
1420). 
24. Andropogon virginicus L. Sp. Pl. 1046, 1753. 
Densely tufted, with a mass of long leaves at the base, the compressed culms 
1 to 1.5 meters high, with delicate feathery racemes scattered along the upper 
half or third. 
Sterile hills and open woods, eastern United States to the West Indies and 
eastern Mexico. Originally described from Virginia. 
Bermuda (Brown & Britton 225), Bahamas (New Providence), Cuba,’ and 
Jamaica. 
25. Andropogon glomeratus (Walt.) B.S, P. Prel, Cat. N. Y. 67. 1888, 
Cinna glomerata Walt. Fl. Carol, 59. 1788. 
Andropogon macrourus Michx. Fl. Bor. Amer. 1: 56. 1803. 
Andropogon densus Desv.; Hamilt. Prodr. Pl. Ind. Occ. 8. 1825. 
Anatherum macrourum Griseb. Mem. Amer. Acad. n. ser. 8: 534. 1862, 
Andropogon tenuispatheus Nash, N. Amer, Fl. 17: 113. 1912. 
A rather robust, densely tufted, erect perenntal with compressed culms, 
crowded keeled lower sheaths, and a feathery club-shaped, usually dense in- 
florescence. Loose-panicled specimens may be distinguished from A. virginicus 
by the smaller spathes rarely overtopping the racemes, 
Moist or dry open ground, southeastern United States through Mexico and 
the West Indies to northern South America. Originally described from South 
Carolina. The type of Andropogon macrourus is from Virginia or Carolina; 
of Andropogon densus from the “Antilles”; of Andropogon tenuispatheus from 
Florida. 
Bahamas (New Providence, Andros, and Eleuthera), Cuba, Jamaica, Haiti, 
Santo Domingo, Porto Rico, St. Kitts, Antigua, Guadeloupe, and Martinique, 
13. CYMBOPOGON Spreng. 
Racemes 2, on slender peduncles, subtended by a spathelike sheath (the 
spathe narrow and often remote in C. hirtus), a staminate awnless spikelet 
borne at the summit of the peduncle in the fork of the two racemes, one or 
both of the racemes sometimes again forking at the lower joints with a stami- 
nate spikelet in the fork, one of the secondary racemes reduced to a single joint. 
1. Cymbopogon hirtus (L.) Nees; Baker, Fl. Maurit, 446. 1877, as synonym of 
Andropogon hirtus L. Sp. Pl. 1046. 1758, 
