HITCHCOCK AND CHASE — GRASSES OF THE WEST INDIES. 283 



Holcus saccharoides Kuntze in Stuckert, Anal. Mus. Nac. Buenos Aires 11: 

 48. 1904. 



Amphilophis saccharoides Nash, N. Ainer. PI. 17: 125. 1012. 



Andropogon saccharoides var. surius Krause, Beiheft Bot. Centralbl. 32: 334. 

 1914. 



A tall erect unbranched perennial with brittle culms, rather firm long flat 

 blades, and an oblong pale silky panicle of numerous racemes, the delicate awns 

 1.5 to 2 cm. long. 



Rocky hills and grassy slopes, southwestern United States to northern South 

 America and the West Indies. 



Originally described from Jamaica. The subvariety paucirameus was de- 

 scribed from Cuba (Wright 1556 being the type) and the variety surius from 

 Barbados (Wiegand 2085). The Cuban specimens were referred by Hitchcock 1 

 to A. leucopogon Nees. This is one of the grasses called " rabo de zorra " in 

 Cuba. 



Cuba, Jamaica, Haiti, Santo Domingo, western Porto Rico, Antigua, and 

 Martinique. 



-19. Andropogon bicornis L. Sp. PI. 1046. 1753. 



Anatherum bicorne Beauv. Ess. Agrost. 128. 1812. 



Saccharum bicorne Griseb. Abh. Ges. Wiss. Gottingen 7: 266. 1857. 



Sorghum bicorne Kuntze, Rev. Gen. PI. 2: 791. 1891. 



A tall robust tufted perennial with long linear blades, scabrous on the mar- 

 gin, and large feathery corymbose inflorescence of delicate racemes, one, some- 

 times two, of the uppermost pediceled spikelets larger than the fertile ones, the 

 other pediceled spikelets rudimentary. Has much the habit of A. condensatus, 

 distinguished from that by the awnless spikelets and paired racemes. 



Grassy hills and banks, southern Mexico to Brazil and widely distributed in 

 the West Indies. The type specimen is probably from Jamaica, though the 

 localities mentioned with the original description are : " Brasilia, Jamaica." 

 Sometimes called " ridging grass." 



Cuba, Jamaica, Haiti, Santo Domingo, Porto Rico, St. Thomas, St. Jan, Tor- 

 tola, St. Kitts, Antigua, Montserrat, Dominica, Martinique, St. Vincent, Grenada, 

 Trinidad, and Tobago. 



20. Andropogon leucostachyus H. B. K. Nov. Gen. & Sp. 1: 187. 1816. 

 Anatherum domingense Roem. & Schult. Syst. Veg. 2: 809. 1817. 

 Andropogon domingensis Steud. Nom. Bot. 45. 1821. 



Sorghum leucostachyum Kuntze, Rev. Gen. PI. 2: 792. 1891. 



A slender, densely tufted erect perennial, the elongate blades with a deeply 

 impressed midvein ; racemes 2 or 3 on slender exserted peduncles, the spikelets 

 obscured by the copious long silky hairs. Foliage villous in some of the Trini- 

 dad specimens, the subvar. subvillosus Hack. 



"Cliffs and grassy slopes, West Indies and southern Mexico to Brazil. Origi- 

 nally described from Venezuela. The type of Anatherum domingense collected 

 in "Domingo" by Poiteau. 



Cuba, Jamaica, Haiti, Santo Domingo, Porto Rico, St. Thomas, and Trinidad. 



21. Andropogon selloanus (Hack.) Hack. Bull. Herb. Boiss. II. 4: 266. 1904. 

 Andropogon leucostachyus var. selloanus Hack, in DC. Monogr. Phan. 6: 420. 



1889. 

 Similar to the preceding, stouter, the blades shorter, broader, and with a boat- 

 shaped tip ; racemes often 5 or 6. 



'Contr. U. S. Nat. Herb. 12: 393. 1909. 



