20 



Order 25.— ANACARDIACEJE. 32. 

 1. Rhus, L. 



glabra, L. (Sumach.) 



Neglected fence rows, &c. Common. June. 

 copallina, 1 L. (Dwarf Sumach.) 



Dry soil; Iron Hill. Common. July, 

 venenata, DC. (Poison Sumach.) 



Swamps; Thompson's, &c. Frequent. June. 

 Toxicodendron, L. (Poison Oak.) 



Rocky places; lower dam, Brandy wine. Frequent. 

 May. 

 Toxicodendron, var. radicans. (Poison Vine.) 

 Climbing trees and fences. Common. May. 



Order 26.— VITACE^E. 33. 



1. Vitis, Tourn. 



Labriisca, 3 L. (Fox Grape.) 



Thickets. Common. June, 

 aestivalis, Mx. (Summer Grape, Raccoon Grape.) 



Woods and thickets. Frequent. June, 

 cordifolia, Mx. (Chicken Grape, Frost Grape.) 



Thickets, &c. Common. June. 



2. Ampelopsis, Mx. 



quinquefolia, Mx. (American Ivy.) 

 Moist woods. Frequent. July. 



Order 27.— RHAMNACEJE. 34. 

 1. Ceanothus, L. 



Americanus, 3 L. (New Jersey Tea.) 

 Dry woods. Frequent. June. 



Order 28.— CELASTRACE.E. 35. 

 1. Celastrus, L. 



scandens, L. Wax-work.) 



Woods, along Brandywine. Frequent. June. 



1 A nearly allied species, native of Japan, furnishes the Copal Varnish. 



2 Many of our cultivated grapes are varieties of this species. 



3 The leaves of this plant were used as a substitute for tea during the 

 Revolutionary war. 



