DESCRIPTIVE MANUAL 



173 



Fig. 97. Stinkweed (Polaniaia trachysperma) . Common in sandy soils, rail- 

 way embankments and gravelly soils. 

 (Photographed by Colburn.) 



Rocky Mountain Bee-plant or Stinking Clover (Cleome serrulata 



Pursh.). 



Description. — A smooth annual; leaves of 3 lanceolate, oblong 

 leaflets, somewhat fleshy; flowers in braeteate racemes; petals 

 usually rose-colored, short-clawed ; stipe of pod as long as the pedicel. 



Distribution. — From western Iowa, Minnesota and northward, 

 Utah, Colorado, Montana and westward; common in Iowa in Fre- 

 mont, Mills, Pottawattamie, and "Woodbury counties, occasionally 

 eastward in Polk county. 



Extermination. — Easily exterminated by cultivation. 



