348 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Blades linear-lanceolate, more than 5 mm. broad ; spike in- 

 terrupted or branched, the branches 1 to 3 era. long. 



4. C. setosa. 



1. Chaetochloa barbata (Lam.). 



Panicum barbatum Lam. Tabl. Encycl. 1: 171. 1791. 



Panicum costatmn Roxb. Fl. Ind. ed. Carey 1: 314. 1820. 



Panicum viaticum Salzm. ; Doell in Mart. Fl. Bras. 2^: 155. 1877. 



A weak-stemmed annual, geniculate at base, with thin scabrous blades and 

 narrow panicles of numerous pale racemes. In small specimens the plaiting of 

 the blades is sometimes obscure. 



A weed in open and waste ground from the West Indies to Brazil, introduced, 

 a native of the tropics of Asia. Originally described from Mauritius. Panicum 

 costatum was descriljed from India, P. viaticum from Brazil. Grisebach ^ mis- 

 applies the name P. flavescens Swartz (a synonym of P.fasciculatum Swartz) 

 to this species. Called " Mary grass " in Tobago. 



Jamaica, Haiti, Porto Kico, Antigua, Guadeloupe, Dominica, Martinique, 

 St. Lucia, St. Vincent, Grenada, Barbados, Trinidad, and Tobago. 



2. Chaetochloa sulcata (Aubl.) Hitchc. Contr. U. S. Nat. Herb. 17: 260. 1913. 



Gamalote. 



Panicum sulcatum Aubl. PI. Guian. 1: 50. 1775. 



A tall cespitose perennial with compressed culms and sheaths, the inter- 

 nodes sulcata on the side toward the sheath, thin strongly plaited blades com- 

 monly 50 cm. long and 5 cm. wide, and elongate narrow panicles with slender 

 bristles several times longer than the spikelets. 



Moist woods, Mexico to Trinidad, Tobago, and Brazil. Originally described 

 from British Guiana. In Trinidad this species is a troublesome weed in cacao 

 groves. 



3. Chaetochloa palmlfolia (Willd.). 



Pn.nicum palmifolium Willd. ; Poir. in Lam. Encycl. Suppl. 4: 282. 1816. 



Panicum plicatum Jiaiticnse Kunth ; Griseb. Fl. Brit. W. Ind. 547. 1S64. 



On the average taller than the preceding, the sheaths hispid, blades larger, 

 panicle larger, the numerous long slender branches drooping. 



Rocky woods and shady banks, often growing in large colonies, apparently 

 Introduced in the West Indies. Originally described from India. The varietal 

 name ascribed by Grisebach to Kunth was probably a herbarium name. It 

 is not found in any of Kunth's v/orks so far as we know. The name Panicum 

 plicatum Lam. has been applied tj this species by many authors, P. pahnifoUum 

 Willd. being based upon P. plicatum as described by Willdenow.^ Panicum 

 palmaefolium Keen.,' an earlier nomen nudum, is probably the same species. 

 n Tobago this grass is called " gamalote." Like Chaetochloa sulcata it is a 

 weed in cacao groves. The former species, however, is rare in Tobago. 



Jamaica, Guadeloupe, Dominica, IMartinique, St. Vincent, Grenada, Trinidad, 

 iDd Tobago. 



4. Chaetochloa setosa (Swartz) Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 4: 



39. 1897. 

 Panicum setosum Swartz, Prodr. Veg. Ind. Occ. 22. 1788. 

 Panicum caudatum Lam. Tabl. Encycl. 1: 171. 1791. 

 Panicum brachiatum Poir. in Lam. Encycl. Suppl. 4: 282. 1816. 

 Setaria elongata Spreng. ; Schult. Mant. 2: 280. 1824. 

 Panicum onurus Willd. ; Nees, Agrost. Bras. 251. 1S29, as synonym. 



* PL Brit. W. Ind. 547. 1864. 

 = Enum, PI. 1033. 1809. 

 "Naturf. 23: 208. 1788. 



