158 UNIVERSITY OF MISSOURI STUDIES [306 



632. H. Salidae Rydb. Salida milk vetch. 

 Plains in Boulder, 5600 ft. (Daniels, 4). 

 Colorado. 



254. OROPHACA Britton. 



633. 0. tridactylica (Gray) Rydb. [Astragalus tridactylicus 

 Gray]. Three-fingered milk vetch. 



St. Vrain's Canon (Rydberg; also Coulter in Wabash College 

 Herb.). 

 Colorado. 



255. ARAGALLXJS Necker. Loco-weed. 



634. A. deflexns (Pall.) Heller [Oxytropis deflexa (Pall.) 

 DC.]. Deflexed loco-weed. 



Boulder Canon ; also in subalpine meadows about Eldora 

 and along the Arapahoe Trail, 6000-1 1000 ft. (Daniels, 808). 

 Saskatchewan and Alaska to New Mexico. 



63 4 >^. A multiceps (Nutt) Heller {^Oxytropis mtdticeps 

 Nutt.] . Cespitose loco-weed. 



Boulder Canon, 9000 ft. (Coulter in Wabash College 

 Herb.). Redrock lake, loioo ft. (Ramaley & Robbins). 



Nebraska to Wyoming and Colorado. 



635. A. minor (Gray) Cockerell. Nov. comb. \Oxytropis 

 multiceps minor Gray; A. multiceps mi?wr (Gray) A, 

 Nels.]. Little loco-weed. 



Sugarloaf, 8500 ft. (Cockerell). Also mountains between 

 Sunshine and Ward, and at Caribou (Rydberg). 

 Colorado. 



636. A. patens Rydb. Broad-leaved loco-weed. 



Plains and foothills near Boulder ; below Sunshine and 

 Ward; Eldora to Baltimore (Rydberg). Common throughout, 

 5500-9000 ft. (Daniels, 333). Boulder is the type locality. 



Colorado. 



