284 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Savannas and open ground, West Indies to Paraguay. The type specimen W*3 

 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 Hitchc. Contu. U. S. 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. Andropog-on urbanianus Hitchc. 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 Fuertes 1420. 



Haiti (Camache, Buch 961, 1074) and Santo Domingo (Salinas, Fuertes 

 1420). 



24. Andropogon virginicus L. Sp. PI. 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. Fir 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 perennial 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. PI. 1046. 1753. 



