296 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
20. Muhlenbergia repens (Presl) Hitchc. in Jepson, Fl. Calif. 1: 111. 1912. 
Sporobolus repens Presl, Rel. Haenk. 1: 241. 1830. 
Type locality, ‘‘Mexico.”’ 
RanGeE: Texas to California and south to southern Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
Curauanua: Southwestern Chihuahua, Palmer 17 in 1885. S&nchez, along rail- 
way, Hitchcock 7723. 
México: Flor de Maria, shallow ponds of prairies, Pringle 3317. 
PurEBLa: Puebla, Nicolas in 1910. 
Veracruz: Orizaba, Bourgeau 3285. 
21. Muhlenbergia dumosa Scribn. in Vasey, Contr. U. 8. Nat. Herb. 3: 71. 1892. 
Type locality, ‘‘Arizona,”’ the type specimen collected ‘‘by streams of the Santa 
Catalina Mts. June 3, 1882,’’ by Pringle. 
Rance: Arizona and southward along the Pacific slope to Jalisco. 
HERBARIUM SPECIMENS FROM MEXIco: 
Sonora: Sierra de los Alamos, Palmer 406 in 1890; Rose, Standley d- Russell 
12802. Teraverachi, Hartman 264. 
Duraneo: San Ramén, Palmer 51 in 1906. 
Jauisco: Sierra de San Esteban near Guadalajara, cool wet ledges, Pringle 2355, 
11230. 
22. Muhlenbergia plumbea (Trin.). 
Vilfa plumbea Trin. Mém. Acad. St. Pétersb. VI. Sci. Nat. 31:98. 1840. 
Sporobolus plumbeus Hemsl. Biol. Centr. Amer. Bot. 3: 546. 1885. 
Type locality, ‘‘Mexico, Min. del monte,’’ the type specimen received from Schlech- 
tendal. 
Rance: Highlands of southern Mexico. 
HERBARIUM SPECIMENS: 
M#xico: Toluca, along ditch, Hitchcock 6911. Federal District, alkaline mead- 
ows, Pringle 6617, 9581; open pasture land, Hitchcock 5899. 
Pursta: San Marcos, railway embankment, Hitchcock 6525. Esperanza, rocky 
hill, Hitchcock 6533. Puebla, Nicolas in 1910. Chalchicomula, along rail- 
way, Hitchcock 6308. 
23. Muhlenbergia seatoni Scribn. in Seaton, Proc. Amer. Acad. 28: 122. 1893. 
Type locality, ‘‘Hills near Esperanza,” the type specimen collected by Seaton 
(no. 320). 
RanGE: Known only from the type collection. 
24. Muhlenbergia spiciformis Trin. Mém. Acad. St. Pétersb, VI. Sci. Nat. 41: 
288. 1841. 
Type locality, ‘‘Mexico,”’ the type specimen collected by Karwinsky. 
Rance: Highlands of central and southern Mexico. 
HERBARIUM SPECIMENS: 
San Luis Porosf: Tamasopo Canyon, limestone ledges, Pringle 3992. 
Micnoacdn: Maravatfo, Arséne in 1908. 
Veracruz: Orizaba, Bourgeau 3327, Miller 2100. Alta Luz, Purpus 5070. 
Oaxaca: Oaxaca, limestone cliffs, Pringle 6025. 
25. Muhlenbergia parviglumis Vasey, Contr. U. S. Nat. Herb. 3:71. 1892. 
Type locality, ‘‘Texas,”’ the type specimen collected by Nealley. 
Rance: Texas to San Luis Potosf. 
HERBARIUM SPECIMENS FROM MEXICo: 
Coanulta: Saltillo, very dry hillsides, Palmer 417 in 1898. 
San Luts Porosf: Minas de San Rafael, Purpus 5011. 
