216 



ROSACEAE (ROSE FAMILY) 



rather thin skin is a layer of soft pulp, but within they are 

 stuffed with the hard, hairy, straw-colored achenes. 



Means of control 



Old bushes require grubbing for their removal. Young ones, 

 while the canes are still green, may be destroyed by repeated cut- 

 ting and salting, or by treating with a little caustic soda about the 

 roots. 



PRAIRIE ROSE 



Rosa arkansana, Porter. 



Other English names: Running Brier-rose, Prairie Bramble. 



Native. Perennial. Propagates by seeds and by rootstocks. 



Time of bloom: June to July. 



Seed-time: Hips ripe in autumn but retained until winter. 



Range: Manitoba, Minnesota, and the Dakotas, southward to 



Colorado, New Mexico, and Texas. 

 Habitat : Prairies ; fields, meadows, 



pastures, waste places. 



In spite of its beauty this plant is 

 considered a bad weed throughout its 

 range, for, though itself but one or 

 two feet tall, it has long, deep-run- 

 ning, branching, underground stems, 

 which, from the axils of their scales, 

 send up many flowering shoots. It is 

 especially troublesome in grain fields 

 and is now established in a number 

 of eastern localities, the seeds having 

 been an impurity of western oats. 



Stem erect, slender, bristling with 

 very thin, fine prickles. Leaflets 

 seven to eleven, obovate, finely and 

 sharply toothed, smooth on both 

 sides, seldom more than an inch 

 long ; stipules long and narrow, some- 

 times toothed above, and more or 

 less glandular. Flowers pink, large, 



FIG. 156. Prairie Wild Rose 

 (Rosa arkansana). X i- 



