232 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



38. PENNISETUM Rich, in Pers. Syn. 1: 72. 1805." 



Spike loose; bristles all naked 1. P. domingcnse. 



Spike narrow, dense; some of the bristles plumose 2. P. setosum. 



1. Pennisetum domingense (Spreng.) Spreng. Syst. 1: 302. 1825. 

 Gy mnothr ix domingensis Spreng.; Schult. Mant. 2: 284. 1824. 

 Eastern Cuba, Wright 1547 in 1857 in the Grisebach and Gray herbaria. 



2. Pennisetum setosum (Sw.) Rich, in Pers. Syn. 1: 72. 1805. 

 Cenchrus setosus Sw. Prod. 26. 1788. 



In thickets skirting pine woods, Pinar del Rio, Wright 3471. 



The Grisebach specimen is from eastern Cuba, numbered "111=3475." Wright's 

 3471 in the- Gray Herbarium is labeled "Edge of savannas, San Juan de Buena vista, 

 Nov. 24." 



39. CHAETIUM Nees, Agrost. Bras. 269. 1829. 



1. Chaetium cubanum (Wright). 



Perotis? cubana Wright, Anal. Acad. Cienc. Habana 8: 288. 1871; Sauv. Fl. Cub. 202. 



Wright 735 in Gray Herbarium. 



The locality is not indicated except that the collection was made in eastern Cuba 

 in 1856-57. This is referred by Doell b to Panicum chaetium Steud. (Chaetium 

 festucoides Nees), but it differs in many respects. The blades are short and narrow, 

 mostly involute; the inflorescence is loose, the spikelets few and distant, narrowed to 

 a pedicel 1.5 mm. long, strongly bearded at the base; first glume very narrow, 22 mm. 

 long including awn, 3-nerved at base; second glume 5-nerved, 18 mm. long, including 

 awn; sterile lemma and fertile lemma thin, 3-nerved, awnless, 4.5 mm. long. 



40. PARATHEPvIA Griseb. Cat. PI. Cub. 236. 1866.c 



1. Paratheria prostrata Griseb. Cat. PI. Cub. 236. 1866. 



Panicum leptochyrium Doell in Mart. Fl. Bras. 2 2 : 150. 1877. 



Wright 3906; Isle of Pines, Curtiss 461. 



The Grisebach specimen, which is the type, bears the secondary number 207, and 

 was collected in 1865. This is listed in Sauvalle's Flora Cubana as Chamaeraphis 

 parvigluma Munro, a nomen nudum, and the Wright number is misprinted 3909. 

 In the Gray Herbarium is a specimen of this species from Santarem, Para, collected 

 by Spruce, which agrees with Curtiss 461 in being more pubescent than the Wright 

 specimen. This appears to be a duplicate type of Panicum leptochyrium Doell, though 

 the specimen is not numbered. 



41. STENOTAPHRUM Trin. Fund. Agrost. 175. 1820. 



1. Stenotaphrum secundum (Walt.) Kuntze, Rev. Gen. PI. 2: 794. 1891. 



Ischaemum secundum Walt. Fl. Car. 249. 1788. 



Wright 3490; Santiago de las Vegas, Baker HC 443, 794, 3649; Matanzas, Britton & 

 Shqfer 140; Guanabacoa, Baker & Ilasselbring 7200; San Antonio, Hitchcock in 1906; 

 nabana, Palmer & Riley 822; Cape Corrientes, Millspaugh 1459; Cabanas, Palmer & 

 Riley 759; Isle of Pines, Palmer & Riley 1008, Roivlee 49; Cienfuegos, Combs 535 in 

 Gray Herbarium. The following are in the herbarium of the New York Botanical 

 Garden: Batabano, Shafer 158; Isle of Pines, Curtiss in 1904. 



The Grisebach specimen was collected in 1860-64. 



In this genus I have followed Leeke, Zeitschr. Natunv. 79. 1907. 

 bin Mart. IT. Bras. 2 2 : 150. 1877. 



cThis genus is referred to Chamaeraphis R. Br. by Hackel (Engl. & Prantl, Pflan- 

 zenfam.) but seems sufficiently distinct. 



