Genus 2. 



SUMAC FAMILY. 



483 



2. Schmaltzia trilobata (Nutt.) Small. Ill- 

 scented Sumac. Skunk-bush. Fig. 2780. 



Rhus trilobata Nutt.; T. & G. Fl. N. A. i : 21Q. 1838. 



Rhus aromatica var. trilobata A. Gray. ; S. Wats. Bot. King's 

 Exp. S3. 1871. 



Schmaltzia trilobata Small, Fl. SE. U. S. 728. 1903. 



A glabrous or somewhat hairy shrub, 2°-6° high. Leaves 

 petioled, 3-foliolate, unpleasantly odorous, i'-2' long; leaf- 

 lets sessile, or nearly so, i'-i' long, puberulent when young, 

 usually glabrous when mature, ovate or oval, obtuse or 

 obtusish, the terminal one commonly considerably larger 

 than the lateral and cuneate at the base, all crenately few- 

 lobed or toothed or sometimes entire; flowers as in the 

 preceding species, and fruit similar. 



Illinois to South Dakota, Texas, Montana, New Mexico and 

 California. March. Races differ much in pubescence. 



3. TOXICODENDRON [Tourn.] Mill. Gard. Diet. Abr. Ed. 4. 1754. 



Small trees, shrubs, or climbing vines, with 3-foliolate or pinnate leaves, poisonous to 

 the touch, and axillary panicles of small, greenish or white, polygamous flowers unfolding 

 after the leaves. Calyx S-cleft; petals and stamens 5; ovary i-ovuled; style terminal. Drupes 

 glabrous or sparingly pubescent when young, the stone striate. [Greek, poison-tree.] 



About 20 species, natives of North America and Asia. Type species : Rhus Toxicodendron, L. 



Leaflets 7-1 1, glabrous. i. T. Vernix. 



Leaflets 3 only. 



Glabrate, or somewhat pubescent ; leaflets thin, entire or sinuate ; fruit not papillose. 



2. T. radicans. 

 Densely pubescent ; leaflets firm in texture, deeply 3-7-lobed ; fruit papillose. 



3. T. Toxicodendron, 



I. Toxicodendron Vernix (L.) Kuntze. Poison or Swamp Sumac. Poison 



. 2781. 



Rhus Vernix L. Sp. PI. 265. 1753. 



Toxicodendron pinnatum Mill. Gard. Diet. Ed. 

 8, no. 4. 1768. 



Rhus venenata DC. Prodr. 2: 68. 1825. 



Toxicodendron Vernix Kuntze, Rev. Gen. PI. 



153. 1891. 



A shrub or small tree, with maximum 

 height of 25° and trunk diameter of 6'. 

 Leaves petioled, pinnate, 6-15' long, gla- 

 brous or somewhat puberulent; leaflets 7- 

 13, thin, obovate, oval, or the lowest ovate, 

 2'-4' long, I'-ii' wide, green both sides, 

 entire, short-acuminate at the apex, nar- 

 rowed or rounded at the base, short-stalked ; 

 rachis terete ; flowers green, about l" broad, 

 in loose axillary panicles 3-8' long; drupe 

 globose-oblong, 2" in diameter, gray, gla- 

 brous. 



In swamps, Maine to Vermont, southern On- 

 tario, Florida, Minnesota, Missouri and Louis- 

 iana.' Very poisonous. Wood soft, yellowish 

 brown ; weight per cubic foot 27 lbs. June. 

 Poison ash or tree. Swamp or poison dog- 

 wood. Poison-wood. 



