HITCHCOCK—MEXICAN GRASSES. ~ 297 
26. Muhlenbergia setarioides Fourn. Mex. Pl. 2: 84. 1886. 
Type locality, ‘‘Orizaba” and ‘‘Sierra de Cristobal pr. Kugenio” cited, with several 
collections from the first named. 
Rance: Veracruz to Guatemala. 
HERBARIUM SPECIMENS FROM MEXICO: 
Veracruz: Under spray of waterfall in the barranca of Texolo, near Jalapa, 
Pringle 8096. Orizaba, Bourgeau 3362, Botteri 698, Mohr 8. 
27. Muhlenbergia porteri Scribn.; Beal, Grasses N. Amer. 2: 259. 1896. 
Muhlenbergia texana Thurb. in Port. & Coult. Syn. Fl. Colo. 145. 1874, not Buckl. 
1863. 
Type locality, ‘‘Texas.’’ 
RANGE: Southwestern United States and along the Pacific slope to central Mexico. 
HERBARIUM SPRCIMENS FROM MEXICco: 
Sonora: Imeris to Santa Ana, Griffiths 6853. 
Carauanua: Chihuahua, hills and plains, Pringle 478. Juarez, dry mesas, 
Pringle 11233. Between Casas Grandes and Sabinal, Nelson 6349. 
Duranaco: Torreén, rocky hill, Hitchcock 7548. 
28. Muhlenbergia brevifolia Scribn.; Beal, Grasses N. Amer. 2: 254. 1896. 
Type locality, ‘‘Mexico (Jalisco),’’ the type specimen collected by Pringle (no. 
4736). 
Rance: Known only from the type locality. 
HERBARIUM SPECIMENS: 
Jauisco: Guadalajara, wet ledges, Pringle 4736, 5867, 9562. 
29. Muhlenbergia arizonica Scribn. Bull. Torrey Club 15: 8. pl. 76. f, a. 1888. 
Type locality, ‘‘Mesas near the Mexican boundary,”’ Arizona, the type specimen 
collected by Pringle in 1884. 
Ranae: Arizona along the Pacific slope to central Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
Sonora: Altar to Sasabe, Griffiths 6917. 
Curmuanvua: Chihuahua, thin, dry soil, rocky hills, Pringle 402; dry bed of river, 
Hitchcock 7784. 
Smatoa: Copradfa, Brandegee in 1904. Lodiego, on river bottoms often inun- 
dated, Palmer 1663 in 1891. 
Duranco: Durango, hillsides and plains, Palmer 536 and 713 in 1896; rocky hill, 
Hitchcock 7590. 
30. Muhlenbergia gracilis (H. B. K.) Kunth, Rév. Gram. 1: 64. 1829. 
Podosaemum gracile H. B. K. Nov. Gen. & Sp. 1: 131. 1816. 
Type locality, ‘‘in aridis exustis montis Mexicani, Volcan de Jorulle.”’ 
Rance: Wyoming to California and southward in the mountains to southern Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
Curavanua: Santa Eulalia Mountains, high summits, Pringle 392, 393. Sierra 
Madre near Colonia Garcia, pine woods, Townsend & Barber 332. South- 
western Chihuahua, Palmer 10a in 1885. Mifiaca, rocky hill, Hitchcock 7769. 
Sénchez, rocky pine woods, Hitchcock 7668. 
Jauisco: Guadalajara, Palmer in 1886. 
MicHoackn: Morelia, Arséne in 1909. 
Mzxico: Cima, Rose & Painter 7211. Federal District, Serrania de Ajusco, 
Pringle 11750. 
Oaxaca: Sierra de San Felipe, Smith 987, 928. High ridge west of San Miguel 
Huantla, Nelson 1910. 
