HITCHCOCK AND CHASE GEASSES OF THE WEST INDIES. 349 



Setaria brachiata Kunth, R6v. Gram. 1: 47. 1829. 



Panicum paractenioides Trin. Mem. Acad. St. P6tersb. VI. Sci. Nat. 1: 219. 

 1834. 



Panicum dumetorum A. Rich. ; Steud. Syn. PI. Glum. 1: 49. 1854. 



Panicum restitutum Steud. Syn. PI. Glum. 1: 53. 1854. 



8etaria setosa var. caudata Gri.seb. Fl. Brit. W. Ind. 555. 1864. 



Pennisetum stcartzii F. Muell. Fragm. 8: 110. 1873. 



A slender, wiry, sparingly branching, tutted perennial, the culms and sheaths 

 compressed ; blades mostly not over 20 cm. long, pubescent or scabrous ; panicles 

 pale, tapering to a slender summit, the branches erect, ascending, or sometimes 

 divergent, the lower commonly 1 to 1.5 cm. long, sometimes as much as 3 cm. 

 long, somewhat remote. One form of this species is more wiry, rigid or woody 

 at base, often decumbent and rooting at the nodes, the branches erect or 

 divergent, the panicles open, with distant slender often reflexed branches. This 

 is found on dry brushy hillsides under more xerophytic conditions. Numerous 

 intermediate specimens connect this form with typical C. setosa. This form 

 was described as Panicum hrachiatum, P. paractenioides, and P. dumetorum, the 

 first from the Antilles, the second from Crab Island (Vieques), the third from 

 Santo Domingo. The following Porto Rican specimens represent this form : 

 Britton & Wheeler 233, from Culebra ; Chase 6519, 6536, from Guanica ; Hess 

 426, from Desecheo ; also Hitchcock 9315, from Kingston, Jamaica. 



Dry or rocky woods. West Indies to Brazil. Originally described from Ja- 

 maica. Panicum caudatum was described from Brazil and Cayenne. The type 

 of Setaria elongata (and of Panicum restitutum) is from Santo Domingo, col- 

 lected by Bertero. Through the courtesy of Dr. Urban we have been able to 

 examine the specimen in the Willdenow Herbarium (no. 18813) mentioned by 

 Nees as "Panicum onurus Willd. Herb." This specimen is Chaetochloa setosa 

 (Swartz) Scribn. and is not the species described by Grisebach^ and others as 

 Setaria onurus. Nees's description of Panicum setosum Swartz var. /3, uuder 

 which Panicum onurus Willd. Herb, is cited as a synonym, is based upon the 

 second specimen cited, namely, one collected in Monte Video by Sellow. The 

 Sellow specimen is Setaria onurus as understood by Grisebach (see no. 7). 

 Richard 2 described C. setosa as Setaria tnacrostachya. 



Bahamas (Water Cay), Cuba, Jamaica, Haiti, Santo Domingo, Porto Rico, 

 St. Thomas, St. Jan, St. Croix, Guadeloupe, and Trinidad. 



5. Chaetochloa rariflora (Mikan). 



Setaria rariflora Mikan; Trin. in Spreng. Neu. Entd. 2: 78. 1821. 



More slender than the preceding, the blades averaging longer and narrower, 

 the spikelike panicle very slender, the short branches appressed, the lower rather 

 distant. 



Sterile brushy hills, West Indies to Brazil, whence originally described. This 

 species has usually been referred to Setaria caudata (Lam.) Roem. & Schult., 

 the type of which, however, belongs to Chaetochloa setosa. 



Porto Rico (Boqueron), St. Thomas, St. Croix, Antigua, and St. Vincent. 



6. Chaetochloa onurus (Willd.) Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. 



Bull. 21 : 27. 1900. 

 Panicum onurus Willd.; Trin. Mem. Acad. St. P^tersb. VI. Sci. Nat. 1: 226. 



1834. 

 Setaria onurus Griseb. Fl. Brit. W. Ind. 555. 1864. 



* Fl. Brit. W. Ind. 555. 1864. 



In Sagra, Hist. Cuba 11: 309. 1850. 



