86 CONTRIBUTIONS FROM THE NATIONAL HEEBAEIUM. 



Atheropogon curtipcndulus Fourn. Mex. PI. 2: 138. 1881. 



Type locality: "Hab. in aridis regionis Illinoensis ad Wabast et in rupibiis ad 

 prairie du rocher." 



Range: 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. S. Nat. Herb. 14: 411. 1912. 

 Dinebra bromoidesJI. B. K. Nov. Gen. & Sp. 1: 172. pi. 51. 1816, not Bouteloua 



bromoides Lag. 1816. 

 Atheropogon radicosits Fourn. Mex. PI. 2: 140. 1881. 

 Type locality: Mexico. 



Range: 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: 364. 



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 locality: Not ascertained. 



Range: 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. 

 Triathcra 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 liiUs, in the Lower Sonoran Zone. 



5. Bouteloua parryi (Fourn.) Griffiths, Contr. U. S. Nat. Herb. 14: 381. 1912. 



Sandhill grama. 

 Chondrosium. parryi Fourn. Mex. PI. 2: 150. 1881. 



Bouteloua polystachya vestita S. Wats. Proc. Amer. Acad. 18: 177. 1883. 

 Bouteloua vestita Scribn. Contr. U. S. Nat. Herb. 2: 531. 1894. 

 Type locality: Near San Luis Potosi, Mexico. 

 Range: 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. 2*: 141. 1805. Six-weeks grama. 

 Chondrosium polystachyum Benth. Bot. Voy. Sulph. 56. 1844. 



Bouteloua polystachya Torr. U. S. Rep. Expl. Miss. Pacif. 5^: 36S. 1857. 



Type locality: Described from cultivated plants. 



Range: 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 Lovyer and Upper Sonoran zones. 



