156 UNIVERSITY OF MISSOURI STUDIES [304 



619. A. nitidus Dougl. SHINING MILK VETCH. 



Canons, north slope of Green Mt., 7000 ft. (Daniels, 278). 

 SASKATCHEWAN to ALBERTA and OREGON; MINNESOTA to 

 COLORADO. 



620. A. sulphurescens Rydb. SULPHUR MILK VETCH. 

 Gregory Canon, and canons on Green Mt., 6000-75 ft- 



(Daniels, 613). Also Boulder Canon and near Boulder (Ryd- 

 berg). Redrock lake, 10100 ft. (Ramaley & Robbins). 

 COLORADO. 



621. A. virgnltatus Sheld. [A. hypoglottis bracteosus Osterh.]. 

 BUSHY MILK VETCH. 



At Boulder, 5000-8000 ft. (Rydberg). 

 WYOMING to COLORADO. 



622. A. goniatus Nutt. [A. hypoglottis polyspermus T. & G.]. 

 PURPLE MILK VETCH. 



Abundant on the plains, mesas, and along streams in the 

 foothills, 5100-9000 ft. (Daniels, 5). 

 SASKATCHEWAN to WASHINGTON ; COLORADO to CALIFORNIA. 



250. TIUM Medic. 



623. T. Drummondii (Dougl.) Rydb. [Astragalus Drum- 

 mondii Dougl.]. DRUMMOND'S MILK VETCH. 



Mesas and foothills, 5700-8000 ft. (Daniels, 76). Valmont 

 (Coulter in Wabash College Herb.). 

 SASKATCHEWAN to ALBERTA; NEBRASKA to COLORADO. 



624. T. alpinum (L.) Rydb. [Astragalus alpinus L.]. AL- 

 PINE MILK VETCH. 



Boulder Canon above Falls; Eldora and along the Arap- 

 ahoe Trail to timberline, 7000-11500 ft. (Daniels, 857). 



LABRADOR to ALASKA; VERMONT to COLORADO: NORTHERN 

 EUROPE and ASIA. 



251. ATELOPHRAGMA Rydb. 



625. A. elegans (Hook.) Rydb. [Phaca elegans Hook. ; Astrag- 

 alus oroboides Americanus Gray]. PRETTY MILK VETCH. 



About Eldora and along the Arapahoe Trail to timberline 

 and beyond, 8600-13000 ft. (Daniels, 1020). 



LABRADOR and QUEBEC to SASKATCHEWAN; IDAHO to COLO- 

 RADO. 



