ANACARDIACEiE. 79 



as the other species, is used in tanning. Lands long neglected are sometimes 

 overrun by this shrub. A variety has dioecious flowers. Jn. Jl. 



Smoolli Sumach. 



2. R. TYPHl'NA, 



Branches and petioles very villous; lenfcts oblong-lanceolate, acuminate, 

 acutely serrate, pubescent beneath, in many pairs. A larger Suniacli than 

 tlie former, attaining tlie height of 20 feet. It grows in low grounds, hedges, 

 &c. The younger slioots and leaf-stalks, are thickly covered with stiff hairs. 

 Leaves pinnate, of many pairs of leaflets. Panicle terminal, dense, oblong. 

 Drupes compact, purple, downy, very acid. The wood is of a sulphur yellow- 

 color, and aromatic odor, dying yellow. Jn. SUig-horn Sumach. 



3. R. Copalli'na. 



Leaves pinnate, the petiole winged ; Icnflets oval-lanceolate, entire ; flowers 

 dioecious. A smaller species, not half the height of the last, in hilly woods, 

 «&:c. Leaves dark green and shining on the upper surface. The stalk be- 

 tween each pair of leaflets, expands into a leafy margin. Panicle of flowers 

 sessile, greenish. Drupes red. Jl. A variety has the leaflets coarse!}' serrate. 



Mountain Sumach. 



4. R. VENENA'TA. Dc. R. vernix. L. 

 Very smooth; lenflcts oval, abruptly acuminate, entire, in many pairs; 



vanicle loose; flowers dicccioua. A shrub or small tree, of fine appearance, 

 growing in swamps. The trunk is several inches in diameter, with diff'use, 

 spreading branches at top. The leaf-stalks are very smooth, wingless, of a 

 fine red color. Leaves pinnate, of about 5 pairs of sessile leaflets, and an odd 

 one stalked. Panicles axillary ; those of the barren tree larger and more dif- 

 fuse. Flowers very small, green. Drupes smooth, whitisli. The whole plant 

 is very poisonous to the taste or touch, and even taints the air to some distance 

 around, with its effluvium, rendering it pernicious to breath. In 48 hours 

 after exposure, inflammation appears on the skin, particularly on the extremi- 

 ties, in large blotches, with burning and itching, terminating in watery pus- 

 tules and eruptions. On some constitutions, it has little or no effect. The 

 varnish called Japan, is a product of this shrub, exuding from incisions made 

 in the bark. Jn. Poison Sumach. Dog-Wood. 



* " Leaves ternate. 



5. R. toxicode'ndron. 



Erect ; leaflets ternate, entire or sinuate-lobed, broad oval : flowers dioecious. 

 A small shrub, 1 — 3 feet high, smooth in all its parts. Grows in woods. 

 Leaves large, shining on tlie upper side. Flowers green, small, in axillary 

 panicles. Poisonous, but in a less degree than the last, Jn. — Jl. Poison Oak. 



6. R. RA'DICANS. 



Stem climbing and rooting. A well known climber, ascending trees to great 

 bights, supported by lateral roots. Leaves ternate, on long stalks, smooth and 

 shining on both sides. Flowers in axillary panicles, small, greenish. Drupes 

 whitish. Connnon in woods and hedges. Poisonous. The juice is useful for 

 marking linen. Jn. Poison Ivy. 



7. R. aroma'tica. 



Leaves ternate ; leafl.ets sessile, incisely crenate, pubescent beneath ; the 

 lateral ones ovate, the terminal ones rhomboid. Flowers in close aments. 



