28 



Pappophorum wrig-htii Wats. Proc. Am. Acad. 18: 178 (1882-83). 



Durango, State of Durango, 721 E. Palmer, September, 1896; Saltillo, State of Coahiiila, 

 395 E. Palmer, September, 1898. 



Cottea pappophoroides Kunth, Rev. Gram. 1: 84, 281, /. .5;.^ (1835^. 



Bolanos," State of Jalisco, 2914 J. N. Roue, September 10-19, 1897. 



Cathestecum prostratum Pre^^l, Rel. Haenk. 1: 295, t. 43 (1830). 



San Antonio Valley, State of Oaxaca, 958 C. L. Smitti, 1894; Colima, 12 E. Palmer, 

 July, 1897; between Huejuquillaand Mesquitec, State of Jalisco, 2582 J. N. Rose, 

 August 25, 1897; a close compact-growing grass with long runners, forming a fine, 

 close sod; spots of considerable size are found covered with it. 



Cathestecum sp. 



Monte Alban, State of Oaxaca, 950 C. L. Smith, 1894. This specimen is doubtfully 

 referred to Cathenitccinii, but is very distinct from both (\ prostraiiun Presl and 

 C. erectuin Vasey and Hack, and is seemingly intermediate between the genera 

 CatkestecuDi and Pentarrhaphis. The material in the National Herbarium is in 

 a too unsatisfactory condition for accurate determination. 



Scleropogon brevifolius Philippi, Sert. Mendoe. 2: 48 (1871). 



Saltillo, State of Coahuila, 386 E. Palmer, September, 1898, common on dry hills. 



Monanthochloe littoralis Engelm. Trans. Acad. Sci. St. Louis, 1: 436. tt. 13, U 

 (1859). 



Altata, State of Sinaloa, 1370 J. N. Rose, June 15, 1897. 



Munroa squarrosa (Niitt.) Torr. Pac. R. R. Rept. 45; 158 (1857). (Crypsis squar- 

 /wrtNutt. Gen. 1: 49 (1818).) 



Colonia Diaz, State of Chihuahua, 6440 E. W. Nelson, September 20-21, 1899. 



Triodia acuminata Benth. in Vasey, U. S. Dept. Agr. Div. Bot..Spec. Rept. 63: 35 

 (1883). 



Saltillo, State of Coahuila, 262 E. Palmer, June, 1898, 813 E. Palmer, September, 1898, 

 in dense tufts on dry rocky hills. 



Triodia avenacea H. B. K. Nov. Gen. et Sp. PI. 1: 156, /. 4S (1815). 



Saltillo, State of Coahuila, 414 E. Palmer, September, 1898, on rocky hillsides, forming 

 dense tufts. 



Triodia pulchella H. B. K. Nov. Gen. et Sp. PI. 1: 155, t. 47 (1815). 



Durango, State of Durango, 740 E. Palmer, September, 1896; Saltillo, State of Coa- 

 huila, 257 E. Palmer, June, 1898, 413 E. Palmer, September, 1898; near Lake 

 Santa Maria, State of Chihuahua, 6414 E. W. Nelson, September 7, 1899. 



Eragrostis ciliaris (L.) Link, Hort. Berol. 1: 192 (1827). 



Acapcmeta, Territorio de Tepic, 3135 J. N. Rose, June 23-30, 1897. 



Eragrostis glomerata (Walt. ) Dewey, Contr. U. S. Nat. Herb. 2: 543 (1894). [Poa 

 glomerata Walt. Fl. Car. 80 (1788); Eragrostis covferta Trin.) Near Cuernavaca, 

 State of Morelos, 6605 C. G. Pringle, 1896. 



Eragrostis limbata Fourn. Mex. PI. 2: 116 (1881). 



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

 6353 E. W. Nelson, September 4-5, 1899; plains near Sierra En Media, State of 

 Chihuahua, 6466 E. W. Nelson, September 24-26, 1899. 

 Eragrostis lugens Nees, Agnjst. Bras. 507 (1829). 



Durango, State of Durango, 727 E. Palmer, September, 1896; Saltillo, State of Coa- 

 huila, 408 E. Palmer, September, 1898, a showy grass, growing in rich soil where 

 stock could not reach it. 

 Eragrostis major Host, Gram. 4: /. 24 (1809). 

 Durango, State of Durango, 720 E. Palmer, September, 1896; Saltillo, State of Coahuila, 



389 E. Palmer, September, 1898, in rich soil about dwellings, in gardens, etc. 

 Eragrostis mexicana Link, llort. Berol. 1: 190 (1827). 



Durango, State of Durango, 531, 768, 875, E. Palmer, June-November, 1896; Colima, 

 20 E. Palmer, July, 1897; Torreon, State of Coahuila, 510 E. Palmer, October, 

 1898; Saltillo, 376,' 409, 411 E. Palmer, September, 1898. 



