WESTERN POISON-IVY 



B153 

 (3 leaves) 



Toxicoden'dron rydber'gii, syns. Rhu'a rydber'gii, R. toxicoden'dron.' and 



T. lon'gipes 



Leaves alternate, long-stalked, di- 

 vided into 3 leaflets 



Leaflets diamond-egg-shaped to 

 rounded, about 1 to 4 in. long, usually 

 coarsely toothed, rather thick, strongly 

 veined beneath, bright green, turning 

 brilliant red in autumn 



Flowers small, whitish yellow with 

 greenish veins, inconspicuous, in 

 branched clusters (panicles) in the 

 leaf axils 



Stems woody, solitary or tufted, sel- 

 dom branched, usually less than 40 in. 

 high 



Fruits (drupes) berrylike, white, shin- 

 ing when ripe, about }\ in. in diameter, 

 numerous, in branched, rather dense 

 Clusters from the leaf axils, usually 

 well developed by July and often 

 persisting through the winter 



1 Of western authors. 



Lilh. A. Hoen & Co. 



