ORDER: Rlltaccac. (Rue. Family.) 

 Ptelea, L. (Shrubby Trefoil. Hop-lree.) 

 Ptelea trifoliata, L. A tall shfhh with trifoliate leaves, and greenish-white 

 small flowers. Fruit bitter, used as a substitute for hops. 



Ailanthus, L. ( Tree-of -Heaven.) 

 Ailanthus glandulosus, L. A well known ornamental tree with pinnate 

 leaves. Odor of the flower.- disagreeable. (Cult.) 



ORDER: Anacardiaceae. (Cashew Family.) 



Rhus, L. ( Sumach.) 



Rhus typhina, L. {Staghorn Sumach.) Shrub or tree 10—30 feet high. 



Branches and stalks densely velvety, hairy. Leaves compound, odd pin- 

 nate. June. (Scarce.) 

 Rhus glabra, L. {Smooth Sumach) Shrub 2—12 feet high. Branches 



smooth, somewhat glaucous; the compound leaves whitened beneath. 



June — July. (Numerous.) 

 Rhus copallina, L. (Dwarf Sumach.) Shrub 1—7 feet high. Branches 



and stalks downy ; petioles wing-margined ; the compound leaves smooth 



and shining above. July. (Numerous.) 

 Rhus venenata, DC. (Poison Sumach or Dogwood.) Shrub 6— 18 feet high. 



Stem and branches smooth or nearly so. Grows in swamps. This is the 



most poisonous specie. June. (Rare.) 

 Rhus Toxicodendron, L. {Poison Ivy. Poison Oak.) A woody climber 



by rootlets over rocks, &c., or ascending trees. June. (Numerous.) 



ORDER: Vitaceae. (Vine Family:) 

 Vitis, Touni. (Grape.) 

 Vitis Labrusca. L. (Northern Fax-drupe.) Climbing shrub with palmately 

 veined leaves, which are rusty woolly beneath.— June. — Berries ripe in Si p- 

 tember, large' (A — % of an inch in diameter. (Numerous.) 

 Vitis aestivalis. Michx. (Summer Grape.') High climbing shrub; leaves, 

 when young downy beneath, smooihish when old, green above. May, 

 June, Berries small, i o J of an inch in diameter. (About 100 spec- 

 imens.) 



Ampelopsis, Michx. (Virginian Creeper.) 

 Ampelopsis quinquefolia, Michx. {Virginian Creeper or American Ivy.) 

 A rapid growing woody vine, with digitate leaves consisting of fiveoblong- 

 lanceolate leaflets, which turn into bright crimson in antumn. July, 'flit- 

 small blackish berries npe in October, (Numerous.) 



ORDER: Rlianiitaceae. (Buckthorn Family.) 

 Khatamis, Touni. (Buckthorn.) 

 Rhamnus lanceolatus. Pursh. X tall shrub with oblong-lanceolate and 

 acute leaves, ycllowish-greeu Howers. Fruit, berry -like drup. May. 

 (Bare.) 



