294 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
13. Muhlenbergia microsperma (DC.) Kunth, Rév. Gram. 1: 64. 1829. 
Trichochloa microsperma DC. Cat. Hort. Monsp. 151. 1813. 
Type locality, ‘‘Mexico.” 
RanGeE: Southwestern United States to southern Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower Cautrornia: Island of San Pédro Martir, Palmer 416 in 1887. San Telmo, 
Orcutt 1435. Cedros Island, Palmer 663 in 1889. San Quentin Bay, Palmer 
687 in 1889. Santa Agueda, Palmer 217 in 1890. Cape St. Lucas, Xantus 
116. San José del Cabo, Purpus 524. Comondu, Brandegee in 1889. Sierra 
de San Francisquito, Brandegee in 1899. La Chuparosa, Brandegee in 1899. 
La Paz, Palmer 729 in 1890. Missién, Orcutt in 1899. Calmallf, Orcutt in 
1899. Guadalupe Island, Palmer 656 and 670 in 1889. Gulf of California, 
Palmer 416 and 510 in 1887. 
Sonora: Guaymas, Palmer 272 and 510 in 1887. Magdalena, Rose, Standley & 
Russell 15092. Hermosillo, rocky hillside among cacti, Chase 5504; Rose, 
Standley & Russell 12506. Alamos, Palmer 691 in 1890. 
Cut#uaHuA: Southwestern Chihuahua, Palmer 158 in 1885. 
Duranao: Tlahualilo, barren hills, Pittier 432. 
San Luis Porosf: San Luis Potosi, edge of field, Hitchcock 5700. 
GuANAJUATO: Irapuato, dry shrubby hill, Hitchcock 7426. 
Hrpaueo: Pachuca, rocky hill, Hitchcock 6701; Orcutt 3915 in part. 
Pursta: San Marcos, railway embankment, Hitchcock 6513. Esperanza, rocky 
hill, Hitchcock 6470. Chalchicomula, dry ground, Hitchcock 6304; Nelson 251. 
Mount Orizaba, Seaton 246. 
Oaxaca: Monte Alban, Smith 938. Cuicatlén, Nelson 1703a. Ocotlén, Lieb- 
mann 639. 
14, Muhlenbergia schaffneri Fourn. Mex. Pl. 2: 85. 1886. 
Type locality, ‘Prope Tacubaya,” Federal District, the type specimen collected 
by Schaffner. 
Rance: New Mexico and Arizona south in the mountains to southern Mexico. 
HERBARIUM SPECIMENS FROM Mexico: 
Curauanua: Santa Eulalia Mountains, ledges, Pringle 404; Pringle in 1888, 
Sanchez, open ground in pine woods, Hitchcock 7664. 
Duraneo: Durango, rocky hill, Iron Mountain, Hitchcock 7644, 7645. Sand{fas 
Station, barranca, Pringle 13634. 
ZAcAaTECAS: Rio Hondo, ledges, Pringle 3894. 
AGUASCALIENTES: Aguascalientes, sterile rocky hill, Hitchcock 7468. 
San Luis Portosf: San Luis Potosf, Schaffner 178. 
Hmauco: El Salto, sandy soil, Pringle 11231. 
Freperat District: Orcutt 4311. 
15. Muhlenbergia biloba nom. nov. 
Bealia mexicana Scribn. in Hack. True Grasses 103, 104. f. 45a. 1890, not Muhlen- 
bergia mexicana (L.) Trin. 1824. 
Type locality, ‘‘Thin soil of dry porphyry mountains. Mexico (Chihuahua), ” as 
given in Beal’s Grasses of North America,! where the species is more fully described, 
the type specimen collected by Pringle (no. 819). 
RanaGE: Pacific slope of northern Mexico. 
HERBARIUM SPECIMENS: 
Lower CaLirornia: Santa Margarita Island, Brandegee in 1889. 
Cutmuanua: Chihuahua, dry porphyry mountains, Pringle 819. 
Duranao: Barranca below Sandfas Station, Pringle 10147. 
12: 268. 1896. 
