140 « PENTANDRIA.— TRIGYNIA. 



210. RHUS. Sumach. Terebintacex. 



* Leaves pinnate. 



I. R. glabrum : leaflets lanceolate, smooth, acumi- 

 nate, acutely serrate, whitish beneath ; flower* 

 perfect ; fruit downy. 

 HAB. Hedges and thickets, July. Shrub 6— 12 ft. 

 high, with strag. branch. ; leajl. 12 — 15 pairs; her. 

 crim. 



2. R. typhinum : branches and petioles very villous ; 



leaflets in many pairs, lanceolate-oblong, acuminate, 

 acutely serrate, pubescent beneath. 

 HAB. Rocky hills. June. Shrub 8—15 high: 

 leajl. 10 — 15 pairs ; pan. dense, oblong; ber.purp. 

 •oilL 



3. R. copallinwn: petiole winged ; leaflets in man} 



pairs, oval-lanceolate, very entire, shining on the 

 upper surface ; panicle sessile ; flowers dioecious. 

 HAB. Dry woods and hill sides. July. Shrub 4 — o 

 ft. high ; leajl. dark-green, 4 — 6 pairs ; ber. red, 

 hairy. 



4. R. Vernix : very smooth ; leaflets in many pairs. 



oval, abruptly acuminate, entire ; panicle loose, 

 flowers dioiecous. 

 HAB. Swamps. June — Jul}'. A small tree; leaf. 

 5 pairs, subsess. ; pan. clust. ; ber. smooth, whitish. 



* * Leaves ternate. 



$. R. Toxicodendron : stem erect ; leaflets broad-oval. 



entire or sinuate-dentate, subpubescent beneath : 



flowers dioecious, in sessile axiliary racemes. 

 HAB. Dry woods. June — July. Shrub 1 — 3 ft. 



In'zh. s?nooth : leav. shin, above ; ber. smooth. 

 /3. radicans : stem climbing. 



HAB. Woods and hedges. Stem climbing very high. 

 6. R. aromaticum : leaflets sessile, ovate-rhomboid, 



dentate, pubescent beneath ; flowers amentaceous, 



dioecious ; berries hairy. 

 HAB. Mountains. April. Shrub small : f . in ax ill . 



racem. or aments. ; her. dust., red. 



