ROSACEAE— ROSA 



511 



Rosa Sayi. Schw. Say's Rose 



A very prickly shrub with low stem, 1-2 feet high; leaflets 3-7 broadly ellip- 

 tical or oblong, lanceolate, glandular, ciliate and resinous ; stipules dilated ; 

 flowers large, solitary or rarely more; outer sepals usually with 1 or 2 narrow 

 lateral lobes. 



Distribution. From northern Michigan, Northwest Territory to Colorado. 



Fig. I 272. Arkansas Rose (Rosa pratincola). A native rose. 

 (Ada Hayden). 



Rosa Woodsii Lindl. Wood's Rose 



Stems usually low ; 6 inches to 3 feet high with slender, straight or recurved 

 spines and scattered prickles, or unarmed above; leaflets 5-7 obovate to oblong 

 or lanceolate, more or less toothed; flowers corymbose or solitary; sepals naked 

 or hispid; fruit globose. 



Distribution. Prairies of Minnesota and from Montana to New Mexico and 

 Texas. 



Mechanical injuries. The prickles inflict injury to cattle, and are especial- 

 ly troublesome in grain fields. Before the binder came into use men were 



