DESCRIPTIVE MANUAL 175 



Fig. 98-B. Rocky Mountain Bee-plant (.Cleome serrulata). 

 (Drawing by Charlotte M. King.) 



ROSACBAB, ROSE FAMILY. ^ 



This family contains the well known rose, apple, pear, quince, 

 plum, peach, almond, strawberry, blackberry, raspberry, spiraea, 

 etc. 



Cinquefoil, False Strawberry {Potentilla monspeliensis L.). 



Description. — ^A hairy annual or winter annual from 1-21/^ ft. 

 high; leaves 3-foliolate, leaflets obovate to oblanceolate, the upper- 

 most toothed, nearly the whole length ; flowers in close cymes, calyx 

 large, 5-cleft with 5 bractlets ; petals 5, yellow, small ; stamens 15-20 ; 

 style terminal ; trichomes simple, long pointed, thick walled. 



Distribution. — ^Naturalized from Europe; eastern Canada, New 

 England, to Kansas ; common in Iowa, in Story, Boone, Polk, Clin- 

 ton, Lyon, Carroll, Woodbury, Kossuth, "Webster, Marshall, Cerro 

 Gordo, Worth, Winnebago, Allamakee and other counties. 



Extenmnation. — ^Frequently introduced with clover seed. Sow 

 only clean clover seed in a clean field. Cut the weed off below the 

 surface of the ground and give thorough cultivation. 



