76 ANACARDIACEJE. (CASHEW FAMILY.) 



thing but " airs from heaven," offer a serious objection to the planting of thia 

 ornamental tree near dwellings. 



ORDER 32. AJVACARDIACEJ3. (CASHEW FAMILY.) 



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

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

 celled and l-ovuled ovary, but with 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. It II IIS, 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. Leaves (simple in K. Cotinus, the Smoke-Plant of gardens) 

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

 Latin name of the genus.) 



1. StlMAC, DC. Flowers polygamous, in a terminal thyrsoid panicle: fruit 

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

 (Not poisonous.) 



1. R. typlllna, L. (STAGHORN SUMACH.) Branches and stalks 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. glabra, L. (SMOOTH SUMACH.) Smooth, somewhat glaucous; 

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

 or barren soil. June, July. Shrub 2 - 12 high. 



3. R. COpallina, L. (DWARF SUMACH.) Branches and stalks downy ; 

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

 which are oblique or unequal at the base, smooth and shining above. Rocky 

 hills. July. Shrub l-7 high, with running roots. Leaflets variable, en- 

 tire or sparingly toothed. 



2. TOXICODF^NDRON, Tourn. 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 effluvium 

 in sunshine affecting some persons.) 



4. R. venenata, DC. (POISON SUMACH or DOGWOOD.) Smooth, 

 or nearly so ; leaflets 7 - 13, obovate-oblong, entire. (R. Vernix, L., partly.) 



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

 called, inappropriately, Poison Elder and Poison Dogwood. 



5. R. Toxicodendron, 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-lobed, or 

 entire When climbing trees, it is R. radlcans, L. Thickets, &c. June. 



