HITCHCOCK—MEXICAN GRASSES. — Qhg 
HERBARIUM SPECIMENS—Continued. 
Jauisco: Guadalajara, hills, Pringle 2375; gravelly plains, Pringle 11734; dry 
open ground, along rim of Barranca de Oblatos, Hitchcock 7324. 
MicHoacdn: Morelia, Arséne in 1909. 
9. Aristida palmeri Vasey, Bull. Torrey Club 10: 42. 1883. 
Type locality, ‘‘Southern Arizona,”’ the type specimen collected by Palmer in 1869. 
RanGeE: Southwestern United States to southern Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower CALIFORNIA: Santa Catalina Mountains, Orcutt 1, 2. 
CHIHUAHUA: Mifiaca, mesa, Hitchcock 7754. Chihuahua, hills and plains, Pringle 
388. 
Zacatecas: Hacienda de Cedros, foothills, Lloyd 195. 
Pursa: Esperanza, rocky hill, Hitchcock 6492. 
10. Aristida longiramea Presl, Rel. Haenk. 1: 224. 1830. 
Type locality, ‘‘Mexico,’’ the particular locality not given. 
Rance: Throughout Mexico. 
HERBARIUM SPECIMENS: 
Curnuanua: Chihuahua, rocky hills, Pringle 387. 
Tepic: Tepic, small bunches on grassy plains and banks of arroyos, Palmer 1916 
in 1892. 
Jauisco: Guadalajara, Palmer in 1885; plains of Guadalajara, Pringle 1810; 
prairie near San Pedro, Hitchcock 7274, 7275. San Nicolas, prairie, Hitch- 
cock 7227; sterile hill, Hitchcock 7233. Rfo Blanco, Palmer 768a, 476, 516, 
517, 520 in 1886. Zapotlan, railway right of way, Hitchcock 7115. 
Micnoacdn: Morelia, Arséne in 1909. 
FEepeRAL District: Pringle 6493, 6544, 6549. 
PurBLA: Tochimilco, Nelson in 1893. Puebla, Nicolas in 1908 and 1909. 
Moretos: Cuernavaca, Holway 3020. 
Oaxaca: Las Sedas, Smith 918. 
11. Aristida spadicea H. B. K. Nov. Gen. & Sp. 1: 123. 1816. 
Type locality, ‘‘juxta Guanaxuato et Mina de Belgrade,’’ the first locality cited, 
the species also found on the banks of the Orinoco and in inundated borders of Guaya- 
quil River. 
Rance: Plateau of Mexico to South America. 
HERBARIUM SPECIMENS FROM MEXIco: 
CuinvuanHuA: Southwestern Chihuahua, Palmer 5 in 1885. Mifiaca, rocky hill, 
Hitchcock 7752, 7764, S&nchez, gravel flat, bottom of ravine, Hitchcock 7709, 
7717. 
Jauisco: Jalisco, Palmer in 1886. 
FrepERAL District: Pedregal, lava, Hitchcock 5935, 5960. 
Oaxaca: Oaxaca, rocky hill, Hitchcock 6139. 
12. Aristida arizonica Vasey, Bull. Torrey Club 13: 27. 1886. 
Type locality, ‘‘Arizona,’’ 
Rance: Southwestern United States and northern Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
CurnvuanuA: Santa Eulalia Mountains, Pringle 389. 
Nurvo LEo6n: Monterey, rocky hill among shrubs, Hitchcock 5520. 
13. Aristida divaricata Humb. & Bonpl. in Willd. Enum. PI. 99. 1809. 
Type locality, ‘‘Mexico.”’ 
Rance: Southwestern United States to southern Mexico. 
HERBARIUM SPECIMENS FROM MEXICO: 
Lower Cauirornis: Santa Catalina Mountains, Oreutt 1, 2. 
