17 



Chaetochloa purpurascens (U. B. K. ) Scril)n. & Merrill, U. S. Dept. Agr. Div. Agros. 

 Bui. 21: 13 (1900). [Set<u-la jiKrjmmscens U.B. K. Nov. Gen. et Sp. PI 1:90 

 (1815).) 

 In the Sierra Madre Mountains, near Santa Teresa, Territorio de Tepic, 3417 J. N. 

 Rose, August 10, 1897; Saltillo, State of Coahuila, 383, 384 E. Palmer, September, 

 1898. 

 Setariopsis auriculata (Fourn.) Scribn. Field Col. Mus. Bot. Ser. 2: 289 (1896). 



(Setaria wmenlata Fourn. i\Iex. PI. 2 : 43 ( 1881 ) . ) 

 Bolanos, State of Jalisco, 2899 J. X. Rose, September 10-19, 1897, small form; Coliina, 



139 E. Palmer, August, 1897, in low places in a graveyard. 

 Ixophorus unisetus (Presl) Schlecht. Linn;ea, 31: 420 (1861-62). { Urochloa uni- 



^!<'ta Presl, Rel. Haenk. 1: 319 (1830).) 

 Colima, 141 E. Palmer, July 1, 1897, a strong-growing grass found iii low places in a 



graveyard. 

 Cenchrus echinatus L. Sp. PI. 1050 (1753). 

 Durango, State of Durango, 880 E. Palmer, October, 1896; Rosario, State of Sinaloa, 



3110 J. X. Rose, June 21, 1897; Colotlan, State of Jalisco, 3603 J. X. Rose, August 



29, 1897. 

 Cenchrus myosuroides H. B. K. Nov. Gen. et Sp. PI. 1: 115, /. 35 (1815). 

 Durango, State (jf Durango, 868 E. Palmer, Novetnber, 1896; near San Juan Capis- 



trano. State of Zacatecas, 2453 J. N. Rose, August 21, 1897. 

 Cenchrus tribuloides L. Sp. PI. 1050 (1753). 

 Durango, State of Durango, 196 E. Palmer, June, 1896; near Casas Grandes, State of 



Chihuahua, 6327 E. ^Y. Nelson, August 30, 1899. 

 Pennisetum longistylum Hochst. Flora, 24: 1 (1841). 

 Topolobampo, State of Sinaloa, 231 E. Palmer, September, 1897. One bunch of this 



grass found near a water ditch and said to have been accidentally introduced 



from Florida. 

 Homalocenchrus hexandrus (Swartz) Britton, Trans. N. Y. Acad. Sci. 9: 14 



(1889). {Leersia hexandra Swartz, Prodr. Veg. Ind. Occ. 21 (1788).) 

 Durango, State of Durango, 195 E. Palmer, June, 1896. Wet banks and in shallow 



water alx)ut ponds and lagoons, extending far from the shore by a network of 



cane-like rootstocks. A very nutritious grass, cattle not only eagerly devouring 



the short tops, but even keeping their heads under water in order to reach the 



submerged portions. 

 Phalaris canariensis L. Sp. PI. 54 (1753). 



Rosario, State of Sinaloa, J. N. Rose, no number, July 26-29, 1897, in a yard. 

 Savastana mexicana ( Rupr. ) Beal, Grasses N. A. 2: 187 (1896). [Ataxia mexicana 



Rupr. Bui. Acad. Brux. 9: 233 (1842); Hierochloa nuwicanaBenth.) 

 Sierra de San Felipe, altitude 3,075 m.. State of Oaxaca, 940 C. L. Smith, August 28, 



1894. 

 Aristida bromoides H. B. K. N^ov. Gen. et Sp. PI. 1: 112 (1815). 

 Saltillo, State (if C^oahuila, 388 E. Palmer, September, 1898; between Casas Grandes 



and Sabinal, State of Chihuahua, 6369 E. AV. Nelson, September 4-5, 1899; near 



Sierra En Media, State of Chihuahua, 6466 E. W. Nelson, September 24-26, 1899. 

 Aristida dispersa Trin. & Rupr. Agrost. 3: 109 (1842). 

 Durango, State of Durango, 535, 767 E. Palmer, September-October, 189t); near 



Plateado, State of Zacatecas, 2703 J. N. Rose, August 31, 1897; Colotlan, State of 



Jalisco, 2812 J. N. Rose, September 6, 1897. 

 Aristida humboldtiana Trin. & Rupr. Agrost. 3: 119 (1842). 

 Pedrigal, Valley of Mexico, Federal District, 6544 C. G. Pringle, October 2, 1896; 



Serrania de Ajusco, Federal District, 6493 C. G. Pringle, September 6, 1896. 

 Aristida interrupta Cav. Icon. 5: 43 /. 471,/. 2, (1799). 



8613— No. 21—00 2 



