The Shrubs of Wyoming. 21 



the true mahogany (Sivictenia mahogani L.) is a tree very dif- 

 ferent from these shrubs. 



Cercocarpus ledifolius Nutt. 



This has seeds like those of the preceding, but the young 

 shoots are somewhat woolly and the leaves narrower and not 

 toothed. In Wyoming this is a more diffuse shrub than the 

 preceding. It is known to occur in the Big Horn mountains. 



Kunzia tridentata (Pursh) Spreng. 



A low, depressed and diffusely branched shrub with grayish 

 branches and very small (less than half an inch long) leaves. 

 The latter are three-toothed and wedge-shaped, green above, 

 white beneath. In spring the bushes become covered with yel- 

 low flowers (one-third of an inch broad), which later are re- 

 placed by beaked, and somewhat egg-shaped minutely hairy 

 fruits (these not fleshy or berry-like). Common in the hills, 

 usually in draws and ravines or occasionally on sandy plains. 



ROSE. 

 (Rosa). 



Native roses are common in the state. Their pink, fragrant 

 flowers and attractive foliage make them general favorites, and 

 they are therefore perhaps more often planted about the home 

 than other native shrubs. On account of their habit of persist- 

 ently suckering from the root they at times become a nuisance 

 and difficult to eradicate. 



Say's Rose (RosaSayi Schwein.) 



The largest flowered as well as the largest leaved of our na- 

 tive roses. It is characterized by the slender prickles of its 

 stems and branches. Its leaves are composed of about seven 

 leaflets which are an inch or more in length. It grows one to 

 two or three feet high and is most frequently found about thick- 

 ets and on partially wooded slopes. 



Prairie Rose (Rosa pratincola Greene). 



A low (one to two feet high), simple-stemmed rose, bearing 



