HITCHCOCK——MEXICAN GRASSES. 337 
1. Bouteloua aristidoides (H. B. K.) Griseb. Fl. Brit. W. Ind. 537. 1864. 
Dinebra aristidoides H. B. K. Nov. Gen. & Sp. 1: 171. 1816. 
Type locality, “‘in asperis frigidis convallis Tolucensis * * * (Regno Mexi- 
cano).” 
Rance: Southwestern United States to South America. 
HERBARIUM SPECIMENS FROM MExIco: 
Lower Cauivornia: Calmallf, on dry plain, Orcutt in 1899. Carmen Island, 
Palmer 859 in 1890. San José del Cabo, Brandegee 4 and 16 in 1890. Los 
Angeles Bay, Palmer 507 in 1887. 
Sonora: Alamos, Palmer 697 in 1890. Yaqui River, Palmer 7 in 1869. Guay- 
mas, rocky lava hill, Hitchcock 3549; Palmer 162 in 1887. Nogales, along 
railway, Hitchcock 3638. Hermosillo, along railway, Hitchcock 3533; meadow 
near river, Hitchcock 3594. Llano, along railway, Hitchcock 3519, 3527. 
Curmuanua: Chihuahua, dry bed of river, Hitchcock 7803; hills and plains, 
Pringle 477, Santa Eulalia Plains, Wilkinson in 1885. Southwestern Chi- 
huahua, Palmer 51 in 1885, Casas Grandes, Nelson 6329. 
StnALoA: Topolobampo, Palmer 237 in 1897. Culiacdn, Brandegee in 1904; 
stony hillsides, Palmer 1547 in 1891. Lodiego, river bottoms, often over- 
flowed during rainy season, Palmer 1650 in 1891. 
CoaunuiLa: Monclova, Palmer 1353 in 1880. Soledad, low mountains with few 
oaks, 25 miles southwest from Monclova, Palmer 1354 in 1880. 
Durango: Tlahualilo, barren hills, Pittier 474. Durango, rocky hill, Iron 
Mountain, Hitchcock 7627, Griffiths 9862; hillsides, Palmer 714a and 717 in 
1896. Torreén, base of rocky hill, Hitchcock 7550. 
ZACATECAS: San Juan Capistrano, on the road to Huejuquilla, Rose 2490. 
AGUASCALIENTES: Aguascalientes, edge of field, Hitchcock 7444. 
San Lurs Potosi: San Luis Potosf, Parry & Palmer 941 in 1878, Schaffner 155. 
Jauisco: Tequila, dry bluffs, Pringle 4592. 
QUERETARO: Querétaro, rocky hill, Hitchcock 5828. 
Cotmma: Manzanillo, along street, Hitchcock 7037; Armerfa, sandy soil, Hitchcock 
7021. 
Oaxaca: Tomellin, along railway, Hitchcock 6240. 
2. Bouteloua procumbens (Durand) Griffiths, Contr. U. S. Nat. Herb. 14: 364. 
1912. 
Chloris procumbens Durand, Chlor. Sp. 16. 1808. 
Type locality unknown. 
RanaeE: Colorado and Utah to South America. 
HERBARIUM SPECIMENS FROM MEXICo: 
CHIHUAHUA: Southwestern Chihuahua, Palmer 3 in 1885. Guerrero, plains, 
Pringle 1434. Sanchez, along railway, Hitchcock 7697. 
Duranco: Durango, rocky hill, Iron Mountain, Hitchcock 7626; abundant on 
mesquite plains, Palmer 712 in 1896. . 
CoAHUILA: Saltillo, moist places on mesas, Palmer 397 and 398 in 1898. Chojo 
Grande, 27 miles southeast of Saltillo, Palmer 332 in 1904. 
e Zacatecas: Zacatecas, dry sterile hill, Hitchcock 7519; Griffiths 8139. 
AGUASCALIENTES: Aguascalientes, weed, edge of field, Hitchcock 7445. 
San Luts Potosi: San Luis Potosf, irrigation ditch, Hitchcock 5692; edge of field, 
EMitchcock 5707; Schaffner 156. Alvarez, Palmer 176 in 1902. 
Jauisco: Guadalajara, Palmer 480 in 1886. 
QUERETARO: Querétaro, rocky field, Hitchcock 5845; agave field, Hitchcock 5862. 
Hipauco: Pachuca, rocky hill, Hitchcock 6710, 6711; sandy river bed, Hitchcock 
6764; Orcutt 3903. Telles, Orcutt 4153, Zontecomate Station, dry mesas, 
Pringle 13242, 
