HITCHCOCK AND CHASE GRASSES OF THE WEST INDIES. 351 



Setaria purpurascens H. B. K. Nov. Gen. & Sp. 1 : 110. 1816. 



Panicum imberbe Poir. in Lam. Encycl. Suppl. 4: 272. 1817. 



Setaria berteroniana Schult. Mant. 2: 276. 1824. 



Panicum penicillatum Nees, Agrost. Bras. 242. 1829. 



Setaria ventenetii Kunth, Rev. Gram. 1 : 251. pi. 31. 1829. 



Panicum berteronianum Steud. Syn. PI. Glum. 1: 50. 1854. 



Setaria glauca var. imberbis Griseb. Fl. Brit. W. Ind. 554. 1864. 



Setaria glauca var. penicillata Griseb. -Fl. Brit. W. Ind. 554. 1864. 



Chaetochloa imberbis Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 4: 39. 1897. 



Chaetochloa imberbis geniculata Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. 

 Bull. 21: 12. 1900. 



Chaetochloa purpurascens Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Bull. 

 21: 13. 1900. 



Chaetochloa ventenetii Nash in Kearney, Contr. U. S. Nat. Herb. 5: 515. 1901. 



Setaria glauca geniculata Urban, Symb. Antill. 4: 96. 1903. 



Setaria glauca purpurascens Urban, Symb. Antill. 4: 96. 1903. 



Tufted, the slender compressed culms erect, geniculate at base, or some- 

 times spreading, the blades mostly 5 to 8 mm. wide, the long-exserted dense 

 spikelike yellow or purplish panicle 5 to 10 cm. long, 6 to 8 mm. thick, exclud- 

 ing the bristles. The bristles vary in length and color. Early in the season they 

 are longer than the spikelets, but on later spikes they may be shorter than the 

 spikelets. 



Open ground and waste places, eastern United States through Mexico and 

 the West Indies to Argentina. An excellent pasture grass. Originally de- 

 scribed from Guadeloupe. The type locality of Setaria ventenetii is Porto Rico, 

 of Panicum penicillatum, Brazil. Poiret gives North America and Brazil as the 

 source of Panicum imberbe. Richard * refers this species to Setaria flava Kunth. 

 Called in Cuba " rabo de gato," " guisasillo," and " hierba de venado." 



Common throughout the West Indies. 



*_ 10. Chaetochloa hispida Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Bull. 21: 

 25. /. 13. 1900. 



Setaria hispida Schum. Just's Bot. Jahresb. 28 1 : 417. 1902. 



Culms slender, compressed, 60 to 100 cm. tall, roughish, at least toward the 

 summit ; sheaths and blades very scabrous, sparsely hispid ; panicle 8 to 15 cm. 

 long, the bristles much exceeding the spikelets. This rare species was de- 

 scribed as being annual, but from the two known specimens we judge it to be 

 perennial. 



In coral or limestone sands, southern Florida and Cuba. Described from 

 Cuba, the type and only Cuban specimen collected by Wright (without number) 

 in January, 1865, in sandy pine woods, La Grifa, Pinar del Rio. 



11. Chaetochloa lutescens (Weigel) Stuntz, U. S. Dept. Agr. Bur. PI. Ind. Inv. 

 Seeds 31: 83. 1912. 2 



Panicum lutescens Weigel, Obs. Bot. 20. 1772. 



Much like C. geniculata in appearance but annual. 



A weed in the garden at Cinchona, Jamaica. Common in fields and waste 

 places in the eastern United States. Introduced from Europe, whence origi- 



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



'This is the species that has been known as Panicum glaucum, Setaria 

 glauca, and Chaetochloa glauca. Stuntz has shown that Panicum glaucum L. 

 should apply to the species usually known as Pennisetum americanum (L.) 

 Schum., Pennisetum glaucum (L.) R. Br. 

 47877°— 17 7 



