126 CLASS V. ORDER III. 



five, with oblong green anthers, and the rudiments of three styles. 

 Fertile panicle more crowded ; corolla about as long as the calyx, 

 green ; germ reddish with three styles. The leaves of this and 

 the two following species are astringent and used in tanning. 

 Berries crimson, astringent, and acid. — June, July. 



Rhus typiiinum. L. Stag's Horn or Velvet Sumach. 



Branches and petioles hairy; leaves pinnate, of 

 many pairs, hairy underneath ; leafets lance-oblong, 

 sharply serrate ; flowers dioecious. 



A larger species than the last ; its leafstalks and young 

 branches covered with thick bristly hair. Bunches of berries 

 crowded, purple, velvet like. This species is also dicEcious. — In 

 low ground. — June. 



The bark and leaves give out a milky juice on being broken, 

 both in this and the other species. 



Rhus copallinum. L. 3Iountain or Dwarf Sumach. 



Leaves pinnate, entire ; petioles membranous, joint- 

 ed ; flowers dioecious. 



A smaller shrub than the preceding. The young branches 

 and petioles are downy. Leafets oval-lanceolate, acute, entire. 

 Between each pair the petiole spreads out into a broad leafy 

 expansion, contracted at the insertion of the leafets. Flowers 

 dioecious. 



Rhus Vernix. L. Poison Sumach or Dogwood. 



American Medical Botany, PI. x. 



Leaves annual, pinnate, glabrous; leafets oblong, 

 entire, acuminate ; panicle lax, flowers dioecious. 

 Syn. Rhus venenata. De Cand. 



This species grows in swamps, where its fine smooth leaves 

 give it the air of a tropical shrub or tree. The trunk is from 

 one to five inches in diameter, branching at top, and covered 

 with a pale greyish bark. The wood is light and brittle, and 

 contains much pith. The ends of the young shoots and the pe- 

 tioles are usually of a fine red color, which contributes much to 

 the beauty of the shrub. The leaves are pinnate, the leafets ob- 



