HITCHCOCK AND CHASE GRASSES OF THE WEST INDIES. 321 



57. Paspahim unispicatum (Scribn. & Merr.) Nash, N. Amer. Fl. 17: 193. 1912. 

 Panic uvi (Dimorphostachys) unispicatum Scribn. & Merr. tJ. S. Dept. Agr. 



Div. Agrost. Bull. 24: 14. 1901. 



Perennial from hard scaly rhizomes, the ascending, sparingly branching 

 culms IS to 45 cm. tall ; blades flat, 8 to 25 cm. long, 6 to 8 mm. wide, pilose 

 on the upper surface at the base and commonly with a few scattered hairs near 

 the margin ; racemes 1 or 2, erect or suberect, 5 to 9 cm. long, the rachis 1 mm. 

 wide ; spikelets in pairs, closely imbricate, pale greenish stramineous, glabrous, 

 obovate, subacute, 2.6 to 3 mm. long, 1.5 mm. wide; first glume of the upper 

 pair of spikelets flat, nerveless or faintly nerved, one-third to two-thirds as 

 long as the spikelet, that of the lower carinate, two-thirds to three-fourths as 

 long as the spikelet. 



Open slopes and dry ground, southern Texas and Cuba (valley of the Rio 

 Zaza and near Habana) to Venezuela. Originally described from Oaxaca. 







58. Paspalum pilosum Lam. Tabl. Encycl. 1: 175. 1791. 

 Panicum monostachyum H. B. K. Nov. Gen. & Sp. 1 : 96. 1816. 



Similar to the preceding, stoloniferous rather than rhizomatous, the culms 

 more compressed, the foliage harshly pubescent ; racemes solitary, commonly 10 

 to 15 cm. long, erect-arcuate, the rachis rarely sparsely pilose; spikelets 

 blunter, the first glume usually less developed. 



Savannas and dryish open ground, Costa Rica to Trinidad and Brazil. 

 Originally described from tropical America; Panicum monostachyum de- 

 scribed from Venezuela. The name P. pilosum is here tentatively applied. It 

 may belong to Panicum monobotrys Trin., in which the rachis is more frequently 

 pilose. 



59. Paspalum piilchellum Kunth, M$m. Mus. Par. 2: 68. 1815. 



Reimaria elegans Humb. & Bonpl. ; Fliigge, Monogr. Pasp. 216. 1810, not Pas- 

 palum elegans Fliigge, op. cit. 183. 



Perennial, in dense tufts, the slender simple culms 30 to 75 cm. tall, the pilose 

 linear subinvolute blades clustered at the base, the culm sheaths bladeless or 

 nearly so ; racemes 2 or 3, approximate, spreading, 2 to 6 cm. long, the solitary 

 ^abrous oval spikelets about 1.8 mm. long; both glumes wanting, the sterile 

 lemma tinged with red, sometimes dark crimson; fruit pale, smooth and 

 shining. 



Savannas, West Indies and northern South America. Originally described 

 from Venezuela, the two names given above based on the same collection. 



Cuba, Santo Domingo, and Trinidad. 



60. Paspalum saccharoides Nees in Trin. Gram. Icon. 1 : pi. 107. 1828. 

 Sacclwrum polystachyum Swartz, Prodr. Veg. Ind. Occ. 21. 1788, not Paspalum 



polystachyum R. Br. 1810. 

 Panicum saccharoides Kunth, R^v. Gram. 1 : 237. pi. 30. 1830. 

 Moenchia speciosa Wender. ; Steud. Nom. Bot. ed. 2. 2: 153. 1841. 

 Tricholaena saccharoides Griseb. Syst. Unt. Veg. Karaib. 117. 1857. 

 Syllepis polystachya Fourn. in Hack, in Mart. Fl. Bras. 2^: 251. 1883, as 

 synonym of Imperata caudata; Fourn. Mex. PI. 2: 52. 1886, the name based 

 on Saccharum polystachyum Swartz, but misapplied to a species of 

 Imperata. 

 Paspalum polystachyum Kuntze, Rev. Gen. PI. 2: 786. 1891, not R. Br. 1810. 

 A robust tufted stoloniferous perennial, the branching culms often 2 meters 

 tall, the overlapping sheaths ciliate, the long flat blades 1 to 1.5 cm. wide. 

 Involute toward the apex, pale and appressed-pubescent on the upper surface ; 

 racemes numerous, commonly 15 cm. or more long, slender, drooping, forming 



