20 



Dnran^o, State of Durango, 731 E. Palmer, Septenilier, 189(5; 948 E. Palmer, Novem- 

 ber, 1896, in rich, moist soil in gardens and fields. 



The grass here taken to be Fournier's Chaboissxa ligulaia agrees so closely witli the 

 published description and plate of that grass that we have little hesitation in so 

 referring it. The only apparent difference is in the awn of the flowering glume, 

 which in No. 731 E. Palmer is 5 to 6 mm. long. Fournier does not refer to the awn 

 and the illustration shows long-acuminate floral glumes. Chaboisssea is placed 

 in the Poaceie by Fournier, ])ut if we have rightly identified Palmer's grass, it 

 certainly belongs to the Agrustidece, and, although the most of the spikelets 

 are 2-flowered, the plant has all the characters of a Muhlenbergia and ought to 

 be referred to that genus. 



Muhlenbergia monticola Buckl. Proc. Acad. Nat. Sci. Phila. 1862: 91 (1862). 



Durango, State of Durango, 528 E. Palmer, August, 1896. 



Muhlenbergia parviglumis Vasey, Contr. U. S. Nat. Herb. 3: 71 (1892). 



Saltillo, State of Coahuila, 417 E. Palmer, September, 1898. Not common; on very 

 dry hillsides. 



Muhlenbergia porteri Scribn. in Beal, Grasses N. A. 2: 259 (1896). 



On the road from Casas Grandes to Sabinal, State of Chihuahua, altitude 1,700 m., 

 6349 E. W. Nelson, September 4-5, 1899. 



Muhlenbergia pringlei Scribn. Trans. N. Y. Acad. Sci. 14: 25 (1894). 



Durango, State of Durango, 529, 724 E. Palmer, August, 1896; Saltillo, State of Coa- 

 huila, 393 E. Palmer, September, 1898. 



*Muhlenbergia setarioides Fourn. Mex. PL 2: 84 (1886). 



Under the spray ot the Cascade in Barranca of Texola, near Jalapa, State of Vera 

 Cruz, altitude 1,100 m., 8096 C. G. Pringle, April 30, 1899. 



Muhlenbergia setifolia Vasey, Bot. Gaz. 7: 92 (1882). 



Saltillo, State of Coahuila, 415 E. Palmer, September, 1898, on dry slopes, rather 

 rare. 



Muhlenbergia texana Thurb. in Coult. Man. Bot. Rocky Mountain Reg. 410 (1885). 



Torreon, State of Coahuila, 511 E. Palmer, October, 1898, in bunches of mesquite 

 bushes; a very wiry species. 



Muhlenbergia vaseyana Scribn. Rept. ]\Io. Bot. Gard. 10: 52 (1899). {M. disticho- 

 phylla Am. authors, not Kunth.) 



State of Oaxaca, 916 C. L. Smith, 1894; Sierra de San Felipe, altitude 3,075 m., 927 

 (in part) C. L. Smith, September 18, 1894; Durango, State of Durango, 542 E. 

 Palmer, August, 1896; Sierra Madre Mountains, west of Bolanos, State of Jalisco, 

 3003 J. N. Rose, September 15-17, 1897. 



Muhlenbergia sp. Allied to if. gracilis Trin., but too young for positive identifica- 

 tion. 



Sierra Madre Mountains, State of Zacatecas, 3527 J. N. Rose, August 17, 1897. 



Lycurus phleoides H. B. K. Nov. Gen. et Sp. PI. 1 : 142 (1815). 



Durango, State of Durango, 526 E. Palmer, August, 1896; near Plateado, State of 

 Zacatecas, 2794 J. N. Rose, September 4, 1897; between Casas Grandes and 

 Sabinal, State of Chihuahua, 6356 E. W. Nelson, September 4-5, 1899. 



Sporobolus cryptandrus flexuosus Thurb. in U. S. Geog. Surv. W. 100th Merid. 6: 

 262 (1878). 



Colonia Diaz, State of Chihuahua, 6458 E. W. Nelson, September 20-21, 1899. 



Sporobolus domingensis Kunth, Enum. PI. 1: 214 (1833). 



Sierra de San Felipe, State of Oaxaca, 51 C. L. Smith, 1894; Durango, State of Durango, 

 384, 737 E. Palmer, July, 1896; Topolobampo, State of Sinaloa, 236 E. Palmer, 

 September, 1897, in open bottom lands. 



Sporobolus indicus (L.) R. Br. Prodr. Fl. Nov. Holl. 1:170(1810). [AyroslL'^ 

 indica L. Sp. PI. ()3 (1753).) 



