HITCHCOCK—MEXIOCAN GRASSES. 299 
88. Muhlenbergia argentea Vasey, Bull. Torrey Club 13: 232. 1886. 
Type locality, ‘‘S. W. Chihuahua,” the type specimen collected in 1885 by Palmer 
(no. 160). 
Rance: Known only from the type collection. 5 
39. Muhlenbergia alamosae Vasey, Bot. Gaz. 16: 146. 1891. 
Type locality, ‘‘ Alamosa in Sonora,’’ the type specimen collected in 1890 by Palmer 
(no. 407). 
Rance: Highlands from northwestern to central Mexico. 
HERBARIUM SPECIMENS: 
Lower CALIFoRNIA: Sierra de la Laguna, Brandegee 79 in 1892. 
Sonora: Sierra de los Alamos, Palmer 407 in 1890; moist ravine, Rose, Standley & 
Russell 13109. 
Cuinuanua: Sanchez, on large bowlder, Hitchcock 7701. 
DuraANGo: San Ramon, Palmer 67 in 1906. 
More tos: Sierra de Tepoxtlén, mossy cliffs, Pringle 6994. 
40. Muhlenbergia setifolia Vasey, Bot. Gaz. 7: 92. 1882. 
Type locality, ‘‘Guadalupe Mountains of Western Texas,”’ the type collected by 
Havard. 
Rance: Texas and the highlands of northern Mexico. 
HERBARIUM SPECIMEN FROM MEXICco: 
CoaHuIta: Saltillo, dry slopes, Palmer 415 in 1898. 
41. Muhlenbergia polycaulis Scribn. Bull. Torrey Club 38: 327. 1911. 
Type locality, ‘‘Dry shaded ledges, Sierra Madre Mts., State of Chihuahua,”’ the 
type specimen collected by Pringle (no. 1414). 
Rance: Arizona and south in the highlands to southern Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
CurauanuA: Chihuahua, cool wet ledges, rocky hills, Pringle 394. Sierra 
Madre, dry shaded ledges, Pringle 1414. 
Duraneco: Durango, in crevices of rocks, Palmer 529 and 724 in 1896. Barranca 
below Sandias Station, Pringle 13633. 
Guanasuato: Acdmbaro, under cliffs, Pringle 13248. 
42. Muhlenbergia pauciflora Buckl. Proc. Acad. Phila. 1862: 91. 1863. 
Type locality, ‘‘Hillsides, Western Texas.”’ 
RanGE: Texas to Arizona and Chihuahua. 
HERBARIUM SPECIMENS FROM MExIco: 
CurnuanHua: Cafion de San Diego, Hartman 793; mountain near San Diego, Hart- 
man 754. 
43. Muhlenbergia monticola Buckl. Proc. Acad. Phila. 1862: 91. 1863. 
* Type locality, ‘‘ Northwestern Texas.”’ 
RaNnGE: Texas to Arizona and southward in the mountains to central Mexico. 
HERBARIUM SPECIMENS FROM MEXIco: 
Sonora: San José Mountains, Mearns 998. Guadalupe Canyon, Merton 2036. 
CurnvuanHua: Santa Eulalia Mountains, Wilkinson in 1885; dry limestone ledges, 
Pringle 396; Chihuahua, cleft of rock on side of gorge, Hitchcock 7787. 
Coaunulita: Saltillo, rocky hill, Hitchcock 5619. 
Hiwa.eo: Tula, limestone hills, Rose, Painter & Rose 8363. 
44, Muhlenbergia elata Vasey, Contr. U. 8. Nat. Herb. 1: 282. 1893. 
Type locality, ‘‘Guadalajara,’’ the type specimen collected in 1886 by Palmer 
(no. 770). 
RanGE: Highlands of southern Mexico. 
