382 REPORT OF NEW JERSEY STATO MUSEUM. 



cccc. Leaves 3-5 foliate, stem prickly, flowers white. Rubus, p. 476 



bb. Stem erect. 



c. Leaves linear, 4-6 mm. long, no perianth, stamens purple. 



Corema, p. 530 

 cc. Leaves oval or obovate, 20-30 mm. broad, corolla white, urn- 

 shaped. Gaultheria, p. 620 

 ccc. Leaves 3-foliate, stem not prickly, flowers small, greenish. 



Rhus, p. 536 

 aa. Woody climbing vines. 



b. Flowers large, tubular, orange, leaves pinnate. Tccoma, p. 695 



bb. Flowers white, leaves 3-foliate, fruit long-plumose. Clematis, p. 454 

 bbb. Flowers small, greenish. 



c. Leaves 3-foliate. Rhus, p. 536 



cc. Leaves 5-foliate. Psedera, p. 548 



ccc. Leaves lobed. 



d. Fruit "hops." [Humulus'l* 



dd. Fruit "grapes." Vitis, p. 546 



cccc. Leaves oval. Fruit round orange pods, splitting and displaying 



red seeds. Celastrus, p. 543 



aaa. Upright trees or shrubs. 



b. Leaves pinnate or digitate. 

 c. Stem prickly. 



d. Leaves 3-5 foliate, fruit a many-seeded berry, flowers white, 

 showy shrubs. Rubus, p. 476 



dd. Leaves 5-9 foliate, fruit a pod containing black seeds, 

 flowers inconspicuous. Zanthoxylum, p. 518 



ddd. Leaves 7-15 foliate, fruit a flat pod, flowers white papili- 

 onaceous in a pendant raceme. Robina, p. 495 

 dddd. Leaves about 24 foliate, leaflets small, less than I in. (25 

 mm.) long, fruit a flat pod 8-15 ins. (2-4 dm.) long. 



[Gleditsia triacanthos]\ 

 cc. Stem not prickly. 



d. Leaves digitate, 5-foliate. [x^sculus hippocastanum]t 



dd. Leaves 3-foliate. 



e. Entire, fruit a flat winged seed. Ptelea, p. 519 



ee. Freely and regularly serrate, fruit in a bladder-like 

 bag; a shrub. Staphylea, p. 543 



eee. Coarsely toothed on terminal half, fruit a samara. 



Acer, p. 543 

 eeee. Several deep irregular lobes, fruit globular white 

 berries, shrubs or small trees. Rhus, p. 536 



ddd. Leaves 5-1 1 foliate. 



e. Trees with small greenish flowers in catkins or clusters. 

 /. Leaves sharply and regularly serrate, fruit a hard 

 nut enclosed in a thick hull. Hicoria, p. 397 



//. Leaves obscurely or bluntly serrate, fruit a samara. 



Fraxinus, p. 635 



* Hope Vine, escaped from cultivation. 

 t Honey Locust Tree, escaped. 

 $ Horse Chestnut, escaped. 



