50 THE BIOLOGY OF HARDING COUNTY 



238 Prunus melanocarpa (A. Nels.) Rydb. Western Chokecherry. 

 In thickets in wooded parts of the valleys. Less abundant 

 than the Wild Plum. 



44. LEGUMINOSAE (Pea Family) 



239 Amorpha canescens Nutt. Lead Plant, Shoe String. 

 Abundant on the steppe, even locally giving the color to the 

 landscape early in August. 



240 Aragalhis Lambertii (Pursh) Greene. Loco. 

 Oxytropis lambertii Pursh. 



Very plentiful in the bunch grass association on the foothills. 

 *24i Aragalhis dispar A. Nels.? 



Common on the plains especially in the rougher areas. 



242 Astragalus bisulcatus (Hook) Gray. 

 Along streams, frequent throughout. 



243 Astragalus caespitosus (Nutt.) Gray? 



Abundant on gravelly soil in the drier parts of the steppe. 

 Grows in compact clumps from a strong tap root. 



244 Astragalus carolinianus L. 



Locally abundant along the Little Missouri River. 

 Astragalus diversifolius Gray? 



Rare on table of Short Pine Hills. 

 Astragalus elatiocarpus Sheld. 



Rare along roads on the plains of southern Perkins Co., etc. 

 247 Astragalus lotiflorus Hook. 



Abundant on rougher land. 

 ^248 Astraguhiis nitidus Dougl. 



Tolerably frequent about buttes. 

 *249 Astragalus pauciflorus Hook? 



Prof. Nelson thinks more material might indicate that this 



represents a new species. Fairly frequent in the bunch grass 



association on the foothills of the forested buttes. 

 *25<D Astragalus Purshii Dougl. 



Rare on the steppe of the extreme northwestern corner. 

 *25i Astragulus succulentus Rich. 



Common on the plains. We found no fresh fruit during the 



dry summers of 1910 or 1911. Quite plentiful in 1912. 

 251 Glycyrrhiza lepidota Pursh. Buffalo Bur. 



A common shrub along stream banks. 



