86 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
Atheropogon curtipendulus Fourn. Mex, Pl. 2: 138. 1881. 
Type tocauty: ‘Hab. in aridis regionis Illinoensis ad Wabast et in rupibus ad 
prairie du rocher.”’ 
Ranae: British America to New Jersey, California, and Mexico. 
New Mexico: Common throughout the State. Plains and hillsides, in the Upper 
Sonoran and Transition zones, An important range grass in some parts of the State. 
2. Bouteloua radicosa (Fourn.) Griffiths, Contr. U. 8. Nat. Herb. 14: 411. 1912. 
Dinebra bromoides H. B. K. Nov. Gen. & Sp. 1:172. pl. 51. 1816, not Bouteloua 
bromoides Lag. 1816. 
Atheropogon radicosus Fourn. Mex. Pl. 2: 140. 1881. 
TyPE LOCALITY: Mexico, 
Ranee: California and New Mexico to Mexico. 
New Mexico: Mangas Springs; Burro Mountains; Mogollon Creek, Dry hills, in 
the Upper Sonoran Zone. 
3. Bouteloua procumbens (Durand) Griffiths, Contr. U. S. Nat. Herb. 14: 264. 
1912. SIX-WEEKS GRAMA, 
Chloris procumbens Durand, Chlor. Sp. 1808. 
Bouteloua prostrata Lag. Gen. & Sp. Nov. 5. 1816. 
Bouteloua pusilla Vasey, Bull. Torrey Club 11: 6. 1884. 
TYPE LocaLiry: Not ascertained. 
Ran@e: Colorado and Arizona to Mexico. 
New Mexico: Cedar Hill; Tierra Amarilla; Chama; Santa Fe; El Rito Creek; 
Ensenada; Las Vegas; Grants; Pecos; Roy; Kingston; West Fork of the Gila; White 
Mountains. Sandy soil, in the Upper Sonoran Zone. 
The type of B. pusilla was collected at Kingman by G. R. Vasey, in 1881. 
4. Bouteloua aristidoides (H. B. K.) Griseb. Fl. Brit. W. Ind. 537. 1864. 
SIX-WEEKS GRAMA. 
Dinebra aristidoides H. B. K. Nov. Gen. & Sp. 1: 171. 1816. 
Triathera aristidoides Nash in Small, Fl. Southeast. U. S. 137. 1903. 
TyPE LocaLity: “‘Crescit in asperis frigidis convallis Tolucensis, alt. 1320 hexap.”’ 
RanGe_: California and western Texas to Mexico and South America. 
New Mexico: Bear Mountain; Deming; Socorro; Dog Spring; Organ Mountains; 
Las Cruces. Dry plains and hills, in the Lower Sonoran Zone. 
5. Bouteloua parryi (Fourn.) Griffiths, Contr. U. 8. Nat. Herb. 14: 381. 1912. 
SANDHILL GRAMA. 
Chondrosium parryi Fourn. Mex. Pl. 2: 150. 1881. 
Bouteloua polystachya vestita 8S. Wats. Proc. Amer. Acad. 18: 177. 1883. 
Bouteloua vestita Scribn. Contr. U. 8. Nat. Herb. 2: 531. 1894. 
TyPE LocaLity: Near San Luis Potos{, Mexico. 
Rance: Western Texas to southern Arizona and Mexico. 
New Mexico: Mesilla Valley; mesa west of Organ Mountains; Jarilla Junction. 
Mesas, in the Lower Sonoran Zone. 
6. Bouteloua barbata Lag. Var. Cienc. 24: 141. 1805. SIX-WEEKS GRAMA, 
Chondrosium polystachyum Benth. Bot. Voy. Sulph. 56. 1844. 
Bouteloua polystachya Torr. U. 8. Rep. Expl. Miss. Pacif. 5?: 366. 1857. 
TYPE LocaLity: Described from cultivated plants. 
Rance: California and Utah to Mexico. 
New Mexico: Carrizo Mountains; San Juan Valley; Chama River; Albuquerque; 
Socorro; Mangas Springs; Santa Rita; Deming; Black Range; Dog Spring; Mesilla 
Valley; Organ Mountains; White Sands; Pecos Valley. Sandy fields and mesas, in 
the Lower and Upper Sonoran zones. 
