122 KEY TO GENERA AND SPECIES 



184. Young twigs velvety-hairy. Fruit red. 

 Throughout our range. (Fig. 232. Leaf 

 outline essentially the same as in Fig. 234.) 

 Staghorn Sumach, Rhus typhina L. 



184. Young twigs not hairy. Fruit red. Central 



Me. southward and westward. (Fig. 234.) 

 Smooth Sumach, Rhus glabra L. 



185. Leaf axis between the leaflets prominently 



winged. Fruit red. Usually a shrub. 



Fig. 231. 

 Smoke Tree. 



Fig. 230. Common Locust. 



Southern Me. southward and westward. 

 (Fig. 233.) Dwarf Sumach, Rhus copal- 

 Una L. 



185. Leaf axis between the leaflets not winged. 

 Fruit whitish or grayish. Very poisonous. 

 Usually growing in swamps. Southwestern 

 Me. southward and westward. (Fig. 235.) 

 Poison Sumach, Poison Elder, Poison Dog- 



