76 ANACAEDIACE^. (CASHEW FAMILY.) 



thing but " airs from hearen," offer a serious objection to tlie planting of this 

 ornamental tree near dwellings. 



Oedek 32. AJVACARDIACE^. (Cashew Family.) 



Trees or shrubs, with a resinous or milky acrid juice, dotless alternate 

 leaves, and small, often polygamous, regular pentandrous flowers, with a 1- 

 celled and 1-ovuled ovary, but mth 3 styles or stigmas. — Petals imbricated 

 in the bud. Seed borne on a curved stalk that rises from the base of the 

 cell, without albumen. Stipules none. Often poisonous. — Represented 

 only by the genus 



1. RHtrS, L. Sumach. 



Sepals 5. Petals 5. Stamens 5, inserted under the edge or between the lobes 

 of a flattened disk in the bottom of the calyx. Fruit small and indehiscent, a 

 sort of dry drupe. — Loaves (simple in R. Cotinus, the Smoke-Plant of gardens) 

 usually compound. Flowers greenish- white or yellowish. (The old Greek and 

 Latin name of the genus.) 



§ 1. SUMAC, DC. — Flowers polygamous, in a tenninal thyrsoid panicle; fruit 

 globular, clothed with acid crimson hairs; the stone smooth: leaves odd-pinnate. 

 (Not poisonous.) 



1. K. typhina, L. (Staghokn Sumach.) Branches and stdlhs densely 

 velvety-hairy; leaflets 11-31, pale beneath, oblong-lanceolate, pointed, serrate. 

 — Hill-sides. June. — Shrub or tree 10° -30° high, with orange-colored wood. 



2. R. ginbra, L. (Smooth Sumach.) Smooth, somcjihat glaucous; 

 leaflets 11-31, whitened beneath, lanceolate-oblong, pointed, serrate. — Eocky 

 or barren soil. June, July. — Shnib 2° - 12° high. 



3. K. copallina, L. (Dwakp Sumach.) Brandies and statics downy ; 

 p-tioles wing-margined between the 9-21 oblong or ovate-lanceolate leaflets, 

 which are oblique or unequal at tlie base, smooth and shining above. — Eocky 

 hills. July. — Shrub 1° - 7° high, with running roots. Leaflets variable, en- 

 tii"e or sparingly toothed. 



§2. TOXICOD^fcNDRON, Toum. — Flowers polygamous, in loose and slender 

 axillary panicles : fruit globular, glabrous, whitish or dun-colored; the stone striate: 

 leaves odd-pinnate or 3-foliolate, thin. {Poisonous to the touch : even the eluvium 

 in sunshine affecting some persons. ) 



4. K. venenata, DC. (Poison Sumach or Dogwood.) Smooth, 

 or nearly so; leaflets 7 -IS, obovate-oUong, entire. (E. Vernix, L., partly.) — 

 Swamps. June. — Shrub 6° -18° high. The most poisonous species. Also 

 called, inappropriately. Poison Eldei' and Poison Dogwood. 



5. K. Toxicodcnclron, L. (Poison Ivy. Poison Oak.) Climb- 

 ing by rootlets over rocks, &c., or ascending trees ; leaflets 3, rhombic-ovate, 

 mostly pointed, and rather downy beneath, variously notched or cut-lobcd, or 

 entire. — When climbing trees, it is E. radicans, L. — Thickets, &c. June. 



