HITCHCOCK GEASSES OF CUBA. 211 



1. Allot eropsis amphistemon (Wright). 



Panicum amphistemon Wright, Anal. Acad. Cienc. Habana 8: 207. 1871; Sauv. 

 Fl.'Cub.,198. 



Wright 3464. 



The type of Panicum amphistemon Wright is in the Gray Herbarium, Wright 3464, 

 labeled "Mayari-abajo, Aug. 2, in small dense tufts. '^ 



2. Alloteropsis dura (Griseb.). 



Panicum durum Griseb. Mem. Amer. Acad. n. ser. 8: 533. 1862. y 



Rocky hills, procumbent in loose tufts, Valestina, September 25, Wright 3868; in ^ 



small tufts on steep hills at the j^arallones^ N. Sophie, September 29, Wright 1539 ' 



in the Gray Herbarium. 



In the Grisebach Herbarium is the type of P. durum, Wright 15^9 from eastern 



Cuba in 1859. 



27. MESOSETUM Steud. Syn. PI. Glum. 1: 118. 1854. o 



Spikelets copiously \dllous-ciliate 1. M. rotthoellioides . 



Spikelets glabrous or somewhat hispid 2. M. ivrightii. 



i^A„. - ■- - " ■ 



1, Mesosetum rottboelliodes (H. B. K.). 



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



Mesosetum cayennense Steud. Syn. PL Glum. 1: 118. 1854. 



Culms scattered, single or few, savannas, M?tatoso, August, Wright 3449; Herra- 

 diKa, Baker HC 2935, Tracy 9058, Hitchcock in l.)06; Isle of Pines, Curtiss 396, Palmer 

 & Riley 889, 896, Taylor 31; Cienfuegos, Combs 4.01 in Gray Herbarium; Sagua, 

 Britton & Wilson 336 in Herb. N. Y. Bot. Gard. 



The Sauvalle specimen has a second label which reads, "In small tufts, Pinales, 

 Daganiguas, Almacigos Consolacion, Sept." The Grisebach specimen from western 

 Cuba, 1863, is numbered "894=3449." Wright 3449 in the Gray Herbarium 

 is from "Savannas, Vueltabajo, July 24." 



2. Mesosetum wrightii sp. nov. 



Culms ascending from a geniculate, rooting .or creeping base, slender, glabrous, 

 20 to 40 cm. long; nodes appressed-hispid; sheaths glabrous below, hispid toward 

 the summit, or the lower hispid throughout, ciliate on the margin; ligule of short 

 bristles; blades flat or somewhat involute on the margins, stiff and thick, yellow- 

 green, hjLspid below and sparsely so above, remotely papillose-ciliate on the car- 

 tilaginous margins, 3 to 6 cm. long, 2 to 3 mm. wide, the uppermost much reduced; 

 spike single, terminating the culm, mostly long-exserted, 2 to 3 cm. long; spike- 

 lets subsessile, appressed to the rachis, alternate, 3 to 4 mm. long, the apex of one 

 about reaching the base of the one above on the same side; first glume glabrous, 

 3-nerved, narrow, acuminate to a blunt point, a little shorter than the second, 

 placed next to the rachis; second glume hispid at the base with a tuft of hairs, 

 sparsely or copiously hispid above, strongly 5-nerved and with some additional 

 striae, narrowed to a blunt apex; sterile lemma similar, somewhat gibbous below, 

 7-nerved, its palea obsolete; fertile lemma chartaceous, smooth, and shining, rounded 

 on the back so as to be as thick as wide, about 2 mm. long, extended into a short 

 point, the margins flat, not inrolled; palea similar and included in the margins of 

 the lemma. 



Type specimen from Cuba, Wright 3859 no. 559961 in the U. S. National Herba- 

 rium. The fragmentary specimen in the Sauvalle Herbarium bears the label 



« Mesosetum Steud. Flora 33: 228. 1850, nomen nudum. The type species of 

 Mesosetum is M. cayennense Steud., "Leprieur legit, in Cayenne," the type speci- 

 men of which, in the herbarium of the Museum at Paris, belongs to the same species 

 as that of Panicum rotthoellioides H. B. K. in the same herbarium. 



