HITCHCOCK——-MEXICAN GRASSES. 291 
RanaeE: Highlands of northern Mexico. 
HERBARIUM SPECIMENS: 
Cutnuanua: Sdnchez, rocky dry bed of stream, Hitchcock 7673. Mifiaca, along 
bed of rocky run, Hitchcock 7765. Sierra Madre, wet ledges by streams, 
Pringle 1418; Jones 7315. 
Duranco: Sand{as Station, barranca, Pringle 13630. 
3. Muhlenbergia ligulata (Fourn.) Scribn. & Merr. U. 8. Dept. Agr. Div. Agrost. 
Bull, 24: 19, 1901. 
Chaboissaea ligulata Fourn, Mex. Pl. 2: 112. 1886. 
Type locality, ‘‘San Luis de Potosi,’’ the type specimen collected by Virlet. 
RanGeE: Central Mexico. 
HERBARIUM SPECIMENS: 
Duranco: Durango, moist soil, in large prostrate masses, Palmer 731 in 1896. 
Sienga, moist soil, Palmer 948 in 1896. 
4. Muhlenbergia diversiglumis Trin. Mém. Acad. St. Pétersb. VI. 4! : 298. 1841. 
Type locality, ‘Mexico, Porto Pedro,’’ the type specimen collected by Karwinsky. 
Rance: Highlands of southern Mexico to Costa Rica. 
HERBARIUM SPECIMENS FROM MEXIco: 
Jautisco: Guadalajara, moist ledges of barranca, Pringle 1739, 2661, 11235. Zapot- 
lin, rocky hill, Hitchcock 7254. 
Micuoacdn: Curt Station, rock fields, Pringle 13246. 
More os: Sierra de Tepostlan, thin soil, Pringle 8364. 
5. Muhlenbergia ciliata (H. B. K.) Kunth, Rév. Gram. 1: 63. 1829.1 
Podosaemum ciliatum H. B. K. Nov. Gen. & Sp. 1: 128. 1816. 
Type locality, ‘‘in radicibus, montis ignivomi Mexicani, Jorullo.’’ 
Rance: Highlands throughout Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower CaLirornua: Sierra de la Laguna, Brandegee 18a. Sierra de San Fran- 
cisquito, Brandegee 16. 
Curmuanua: Sierra Madre, dry shaded ledges, Arroyo Aucho, Pringle 1435. 
Duranco: Durango, under overhanging rock at hilltop, Palmer 719 in 1896. 
Jauisco: Guadalajara, moist ravines, Pringle 11745; narrow shady ditch near San 
Pedro, Hitchcock 7295. Zapotlan, on brick wall, Hitchcock 7256. San Nicolas, 
sterile clay hill, Hitchcock 7203. Chapala, Rose 3479. Bolafios, Rose in 1897. 
MicnoacAN: Uruapdn, open stony place, Hitchcock 69663. Curt Station, rock 
fields, Pringle 13245. Morelia, Arséne in 1909. 
Mzxico: San Nicolds, Bourgeau 1034. Federal District, lava fields, Pringle 9584; 
Oreutt 4247. 
Veracruz: Zacuapan, wet soil, Purpus 2899. Orizaba, Botteri 707; Mohr in 
1857; Ross 1174. 
MoreELos; Cuernavaca, large tufts, side of rocky cliff, Hitchcock 6860; barranca, 
Pringle 11229; Rose & Painter 6931. 
Oaxaca: Cuicatlan, valley, Nelson 1869. Oaxaca, Rose 3688. 
6. Muhlenbergia tenella (H. B. K.) Trin. Gram. Unifl. 192. 1824. 
Podosaemum tenellum H. B. K. Nov. Gen. & Sp. 1: 128. 1816. 
Type locality, ‘‘in scopulosis frigidis andium Mexicanorum, inter Rio Frio et 
Baranca Honda * * * (Prov. Xalapensi.).”’ 
Rance: Highlands, Chihuahua to Costa Rica. 
1 This and several other combinations under Muhlenbergia are commonly credited 
te Trin. Gram. Unifl. 193 and 194, 1824, but Trinius there merely lists a number of 
species, some doubtfully, as belonging to Muhlenbergia without formally transferring 
them to that genus. 
