HITCHCOCK AND CHASE—GRASSES OF THE WEST INDIES. 849 
Setaria brachiata Kunth, Rév. Gram. 1: 47. 1829. 
Panicum paractenioides Trin. Mém, Acad. St. Pétersb. VI. Sci. Nat. 1: 219. 
1834. 
Panicum dumetorum A. Rich.; Steud. Syn. Pl. Glum. 1: 49. 1854. 
Panicum restitutum Steud. Syn, Pl. Glum. 1: 53. 1854. 
Setaria setosa var. caudata Griseb. F]. Brit. W. Ind. 555, 1864. 
Pennisetum swartzit F. Muell. Fragm. 8: 110. 1873. 
A slender, wiry, sparingly branching, tufted 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 8 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 brachiatum, 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 Panicwm setosum Swartz var. 8, under 
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 Sefaria onurus as understood by Grisebach (see no. 7). 
Richard 2 described C. setosa as Setaria macrostachya. 
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. Mém, Acad. St. Pétersb. VI. Sci. Nat. 1: 226. 
1834. 
Setaria onurus Griseb. Fl. Brit. W. Ind. 555. 1864. 
1K Brit. W. Ind. 555. 1864. 
*In Sagra, Hist. Cuba 11: 309. 1850. 
