ANACARDIACEAE 429 



Pa. Northampton, Lehigh, Bucks and Delaware counties. 

 Distribution scattered and little understood. 



ANACARDIACEAE 



Fruit densely pubescent, its stone smooth. 



I lowers in dense terminal panicles appearing after the leaves. I. Rhus. 



Flowers in clustered spikes, appearing before the leaves. 2. Schmaltzia. 



Fruit glabrous, or sparingly pubescent, its stone striate. 3. Toxicodendron. 



i. Rhus [Tourn.] L. 



Rachis of the leaf wing-margined. 1. R. copallina. 

 Rachis of the leaf not wing margined. 



Foliage and twigs velvety pubescent. 2. R. hirta. 



Foliage and twigs mostly glabrous and glaucous. 3 R glabra. 



i. R. copallina L. In dry soil: Me. and Ont. to Fla., Minn., Neb. 

 and Tex. 



Common throughout the range except in the pine-barrens, there 

 wanting. 



2. R. hirta (L.) Sudw. In dry rocky soil: N. S. to Ga., Ont., S. 



Dak., Mo. and Miss. 



Conn. Throughout the state. 



N. Y. Very rare on the north shore of L. I. and on S. I., thence 



increasing but not very common northward. 

 N.J. Very rare along the Delaware in Gloucester, Camden, Bur- 

 lington, and Mercer counties, thence increasing and not common 

 northward. 

 Pa. Throughout the area. 



Tertiary, o: Cretaceous, very rare, and practically confined to 

 the glacial terraces of the lower Delaware. Older Formations, in- 

 creasing northward. 117-220 days. Sea level-3,68o ft. 



3. R. glabra L. (R. pyramidalis Greene, R. bipinnata Greene). 



In dry soil: N. S. to B. Col., Fla., Miss, and Ariz. 



Common throughout the area except in the pine-barrens, there 

 wanting, and rather rare in the region surrounding the barrens. 



2. Schmaltzia Desv. 

 1. S. crenata (Mill.) Greene (Rhus aromatica Ait.). In rocky 

 woods: Ont. and Vt. to Fla., Minn., Kan. and La. 



In our area reported only from " Guildford, Conn, on a small rock 

 outcrop in a salt marsh." Not seen by me. 



