164 Proceedings of the Ohio State Academy of Science 



1. Blade of the leaf slightly decurrent on the petiole, thin, glabrous 

 or slightly pubescent beneath. C. cotinoides. 



1 . Leaves mostly rounded or obtuse at the base, coriaceous, more pu- 

 bescent. C. cotinus. 



I. Cotinus cotinoides (Nutt.) Britt. American Smoke- 

 tree. A small wide-branched tree. Mo. and Okl. to Tenn. and 

 Ala. 



*. Cotinus cotinus (L.) European Smoketree. A small 

 tree, native of Europe. 



Ilicaceae. Holly Family. 



54. Ilex L. Holly. 



Shrubs or trees with watery sap, and alternate simple leaves. 

 Drupe berry-like, with 4-8 long nutlet-like stones. 



1. Leaves thick, persistent, evergreen, spiny. /. opaca. 



1. Leaves thin, deciduous, not spiny. 2. 



2 . Leaves small, obovate or spatulate, crenate ; nutlets of the fruit ribbed. 



/. decidua. 

 2. Leaves large, ovate or lanceolate, sharply serrate, nutlets ribbed. 

 I. uionticola. 



1. Ilex opaca Ait. American Holly. A tree of slow 

 growth with thick, glabrous, evergreen leaves and globose red or 

 rarely yellow- drupes. Twigs with leaves and fruit much used for 

 Christmas decoration. Wood very white, fine-grained, hard, 

 strong, tough, light in weight, and easily worked ; used for cabi- 

 net-work and in turnery. Bird-lime is prepared from the mid- 

 dle bark. In itioist soil. Should be much planted for ornament 

 in suitable places. The leaves should be cut off when trans- 

 planted. Me. to Fla., Penn., Mo., Tex., and Ohio. 



2. Ilex decidua Walt. Deciduous Holly. A shrub or 

 small tree with light-gray, glabrous twigs and red drupes. In 

 swamps and low ground. D. C. to Fla., Kan., and Tex. 



3. Ilex monticola Gr. Mountain Holly. A shrub or 

 slender, erect tree growing in mountain woods. Drupes red. N. 

 Y. to N. Car. and Ala. 



