25 



Tyjie collected Jn the State of Durango, 2334 J. N. Kose, August 16, 1897. Readily 

 distinguished from the other species in this genus by its stout culms, lax i^ani- 

 cles, long capillary branches, scabrous empty glumes, and long sterile palea. 



Microchloa indica (L. f.) Kuntze, Rev. Gen. PL 3^: 356 (1898). {Nardus indica 

 L. f. Suppl. PI. 105 (1"81); Microchloa setacea R. Br. Prodr. Fl. Nov. Holl. 1: 

 208 (1810).) 



Durango, State of Durango, 532 E. Palmer, August, 1896. 



Cynodon dactylon Pors. 8yn. PI. 1: 85 (1805). 



Saltillo, State of Coahuila, 254 E. Palmer, June, 1898; 814 E. Palmer, October, 1898. 



CHLORIS CLANDESTINA Scribn. & Merrill, nom. nov. ( Gymnopogon longifoUus 

 Fourn. Mex. PI. 2: 144 (1881); CMoris longifolia Vasey, Contr. U. S. Nat Herb. 

 1: 284, pi. 19 (1893), not Steud. Syn. PI. Gram. 205 (1854).) 



Topolobampo, State of Sinaloa, 238 E. Palmer, September, 1897, in small bunches 

 under other plants in bottom lauds. 



Chloris elegans H. B. K. Nov. Gen. et Sp. PL 1 : 166 (1815). 



Durango, State of Durango, 176 E. Palmer, June, 1896; 765 E. Palmer, October, 1896; 

 near Colotlan, State of Jalisco, 3604 J. N. Rose, August 29, 1897; Colima, 140 E. 

 Palmer, September, 1897; Topolobampo, State of Sinaloa, 245 E. Palmer, Septem- 

 ber, 1897; Parras, State of Coahuila, 448 E. Palmer, October, 1898; on the road 

 from Casas Grandes to Sabinal, State of Chihuahua, 6354 E. W. Nelson, September 

 4-6, 1899, in open bottom lands, among cacti and other plants. 



Chloris submutica H. B. K. Nov. Gen. et Sp. PL 1 : 167, t. 50 (1815) . 



Durango, State of Durango, 181 E. Palmer, June, 1896; in the Sierra Madre Moun- 

 tains, near Santa Teresa, Territorio de Tepic, 2143 J. N. Rose, August 9, 1897; 

 Saltillo, State of Coahuila, 390 E. Palmer, September, 1898. 



Bouteloua aristidoides (H. B. K. ) Griseb. Fl. Brit. W. Ind. 537 (1864). {Dinebra 

 anstklokles II. B. K. Nov. Gen. et Sp. PL 1 : 171 (1815).) 



Durango, State of Durango, 717 E. Palmer, September, 1896; near San Juan Capistrano, 

 State of Zacatecas, 2490 J. N. Rose, August 23, 1897; Topolobampo, State of Sinaloa, 

 237 E. Palmer, September, 1897; Torreon, State of Coahuila; 513 E. Palmer, Octo- 

 ber, 1898; near Casas Grandes, State of Chihuahua, 6329 E. W. Nelson, August 30, 

 1899. 



Bouteloua bromoides (H. B. K.) Lag. Gen. et Sp. Nov. 5 (1816). {Dinebra bromoides 

 H. B. K. Nov. Gen. et Sp. PL 1 : 172. t. 51 ('l815).) 



Between Monte Escobedo and Colotlan, State of Jalisco, 2672 J. N. Rose, August 28, 

 1897; near Pachico, State of Chihuahua, 6258 E. W. Nelson, August 22-24, 1899; 

 Sierra Madre Mountains, 10 miles north of Pachico, 6305 E. W. Nelson, August 25, 

 1899. 



Bouteloua curtipendula (Michx. ) Torr. in Emory, Notes Mil. Recon. 153 (1848). 

 ( Chloris curtipendula Michx. Fl. Bor. Am. 1 : 59 (1803) ; B. racemosa Lag. Varied. 

 Cienc. Lit. Art. 2*: 14 (1805).) 



Monte Alban. near Oaxaca, State of Oaxaca, 958 C. L. Smith, September 5, 1894; Bola- 

 nos. State of Jalisco, 2929 J. N. Rose, September 10-19, 1897; Durango, State of 

 Durango, 194 E. Palmer, June, 1896; Saltillo, State of Coahuila, 407 E. Palmer, 

 September, 1898; below Pachico, State of Chihuahua, 6247 E. W. Nelson, August 

 22-24, 1899. 



Bouteloua havardi Vasey, Proc. Am. Acad. 18: 179 (1883). 



Durango, State of Durango, 546 E. Palmer, August, 1896; near Huejuquilla, State of 

 Jalisco, 2532 J. N. Rose, August 24, 1897; near Plateado, State of Zacatecas, 2782 

 J. N. Rose, September 3, 1897. 



Bouteloua Mrsuta Lag. Varied. Cienc. Lit. Art. 2*: 141 (1805). 



Durango, State of Durango, 870 E. Palmer, November, 1896; betw^een Concepcion 

 and Acaponeta, 1904 J. N. Rose, July 29, 1897; nearAcaponeta, Territorio de Tepic, 

 3293 J. N. Rose, July 30, 1897; on the road between Huejuquilla and Mesquitec, 



