13 



West Indies, Mexico, South America. 



Specimens exajiined. — Mexico: Durango, 378, 471, 539 Palmer 1896; Rio Hondo, 3156 



Holway 1898; Jalisco, Guadalajara, 293 Palmer 1886; Oaxaca, 5723 Galeotti 



1840; 342 Conzatti & Gonzalez 1897; '710 Nelson 1894; Coahuila, 431 Pringle 



1885; Guanajuato, Duges 1893; Orizaba, 631 Botteri, 2639 Bourgeau, 1865-66; 115 



Seaton 1891; San Luis Potosi, 1041 Schaffner 1876; without locality, Ghiesbreght 



1842. Cuba: 3472 Wright 1860-64. 



St. Croix: 243 Ricksecker 1896. 



Puerto Rico: 6861 Sintenis 1887. 

 Foumier^ makes a variety latifolia of 



this species {Setaria geniculata), 



based on 2639 Bourgeau and 5723 



Galeotti, both of which are repre- 

 sented in the Gray Herbarium. 



In these specimens none of the 



leaves exceed 8 mm. (4 lines) in 



width. In the original descrip- 

 tion the leaves are described as 



"longues, larges du trois d, quarire 



lignes, planes, glabres," etc. In 



other sijecimens cited by Fournier 



as representing the type 350 Lieb- 



mannand Ghiesbreght 1842, rep- 

 resented in the United States 



National Herbarium, the plants 



are depauperate, with narrow 



leaves, not exceeding 6 mm. wide, 



and shorter, narrower spikes. In 



Jaquin'^ the description and plate 



represent the type as having 



broad leaves and thick, elongated 



spikes; hence it would seem that 



Fournier had a wrong idea of the 



type, which is best represented 



by his variety latifolia. 



CH^TOCHLO A IMBERBIS 



STREPTOBOTRYS (Fourn.) 



n. comb. Setaria streptobotrys 



Fourn. Mex. PI. Enum. Gram. 47 



(1886) . 

 A pale, glaucous form, 4 to 6 dm. 



high, with stout, erect culms, 



linear-lanceolate, glaucous, and 



nearly glabrous leaves and pale-green panicles, 6 to 10 cm. long, about 6nmi. in 



diameter; setae pale-green, spreading. Closely related to var. geniculata. 

 Mexico. 

 Specimens examined. — Mexico: Oaxaca, 342 Conzatti & Gonzalez 1897; Coahyila, 431 



Pringle 1885; Durango, 378, 381,471 Pahner 1896. 

 3. CH-ffiTOCHIiOA PTJRPTJRASCENS (H. B. K.) n. comb. Setaria jmrpurascens 



H. B. K. Nov. Gen. & Sp. PL 1 : 110 (1815) . (Fig. 3.) 

 An erect or ascending, ctespitose perennial, 1 to 6 dm. high, from short, creeping root- 

 stocks, with short, lanceolate or linear-lanceolate leaves, short setse, and dense. 



Fig. 3. — Chcetochloa purpura scens: a, spikelet showing 

 the setse; b, spikelet showing the first and third 

 glumes ; c, flowering glume, dorsal view. 



^ Mex. PI. Enum. Gram. 46. ^ Eclogee Gram. t. 27, Fennisetum geniculalum. 



