305] FLORA OF BOULDER, COLORADO 157 



252. XYLOPHACOS Rydb. 



626. X. Parryi (Gray) Rydb. [Astragalus Parryi Gray]. PAR- 

 RY'S MILK VETCH. 



On rocks, Gregory Canon road and other bare ridges in the 

 foothills, 5900-9000 ft. (Daniels, 638). 

 WYOMING to COLORADO. 



627. X. Shortianus (Nutt.) Rydb. [Astragalus Shorhanus 

 Nutt.]. SHORT'S MILK VETCH. 



Dry plains, mesas, and ridges in the foothills, 5100-9000 ft. 

 (Daniels, 35). 

 NEBRASKA to WYOMING; COLORADO to ARIZONA. 



253. HOMALOBTJS Nutt. 



628. H. tenellus (Pursh) Britton [Astragalus tenellus Pursh; 

 A. multiflorus (Pursh) Gray]. SLENDER MILK VETCH. 



Boulder Canon above Falls and at Eldora, 7000-10000 ft. 

 (Daniels, 539). Also at Ward, and mountains between Sun- 

 shine and Ward (Rydberg). 



SASKATCHEWAN to YUKON; MINNESOTA and NEBRASKA to 

 COLORADO and NEVADA. 



629. H. decumbens Nutt. [Astragalus decumbens Gray] . DE- 

 CUMBENT MILK VETCH. 



Valley lying west of South Boulder Peak and Bear Moun- 

 tain, 7000-7500 ft. (Daniels, 444). 

 WYOMING to COLORADO. 



630. H. campestris Nutt. [Astragalus campestris Gray; A. 

 convallarlus Greene]. PLAINS MILK VETCH. 



Meadows on Green Mountain, 6500-8100 ft. (Daniels, 316). 

 MONTANA to BRITISH COLUMBIA; COLORADO to UTAH. 



631. H. flexnosus (Dougl.) Rydb. [Phaca flexuosa (Dougl.) 

 Hook.; Astragalus flexuosus Dougl.]. FLEXILE MILK 



VETCH. 



Near Boulder (Rydberg). 



SASKATCHEWAN to ALBERTA; MINNESOTA to KANSAS and 

 COLORADO. 



