GENUS 2. 



SUMAC FAMILY. 



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

 scented Sumac. Skunk-bush. Fig. 2780. 



Rhus trilobata Nutt. ; T. & G. Fl. N. A. i : 210. 1838. 



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

 Exp. 53. 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'-l' 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. Card. 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 5-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 



Elder. Fig. 2781. 



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



Toxicodendron pinnatttm Mill. Card. 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'-is' 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 i" 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 Ibs. June. 

 Poison ash or tree. Swamp or poison dog- 

 wood. Poison-wood. 



