Buus. XXXII. ANACARDIACER. 203 
2. R. TypHina. Stag-horn Sumach. 
Branches and petioles densely villous; Ifts. 6—15 pairs, oblong-lanceolate, 
acuminate, acutely serrate, pubescent beneath; fr. red, with crimson hairs.— 
A larger shrub than the former, attaining the height of 20f, in rocky or low 
barren places, U.S. and Can. Stem with straggling, thick branches. Leaves 
at length 2—3f long. Leaflets 2—4’ long, } as wide, sessile, except the termi- 
nal odd one. Flowers in terminal, thyrsoid, dense panicles, yellowish-green, 
often 9 jior 4 © o&._ Drupes compressed, compact, the crimson down very 
acid. Jn.—The wood is aromatic, of a sulphur-yellow, and used in dyeing. 
8. laciniata—Lfts. very irregularly coherent and incised; panicles partly 
transformed.into gashed leaves. Hanover, N. H. Rickard. 
3. R. copauytina. Mountain Sumac. 
Branches and petioles pubescent; /fts. 4—10 pairs, oval-lanceolate, mostly 
entire, unequal at base, common petiole winged; jis. in dense panicles; drupes 
’ red, hairy.—A smaller shrub, not half the height of the last, in dry, rocky pla- 
ces, U.S. and Can. Common petiole about 6’ long, expanding into a leafy 
margin, between each pair of leaflets. Leaflets 1—3’ long, near 3 as wide, 
dark green and shining on the upper surface. Panicles of flowers terminal, 
sessile, thyrsoid, Q g', greenish. Drupes acid. 
B. leaflets coarsely and unequally serrate. N.Y. Barratt. 
- 4. R.venenita. DC. (R. vernix. Linn.) Poison Sumac. Dog-wood. 
Very glabrous; /fts. 3: pairs, oval, abruptly acuminate, very entire; 
panicles loose, pedunculate ; drupes greenish-yellow, smooth.—A shrub or small 
tree of fine appearance, 10—15f high, in swamps, U.S. and Can. Trunk seve- 
ral inches diam., with spreading branches above. Petioles wingless, red, 6—10/ 
long. Leaflets about 3’ long, nearly 4 as wide, sessile, except the odd one. 
Panicles axillary, 2 3’, those of the barren tree more diffuse. Flowers very 
small, green. Drupes as large as peas. Jn. The whole plant is very poison- 
ous to the taste or touch, and even taints the air to some distance around with 
its pernicious effluvium. 
** Leaves ternate. — 
5. R, ToxicoDENDRON. Poison Oak. Poison Ivy. : 
Erect or decumbent; vs. pubescent; /fts. broadly oval, acuminate, entire 
or sinuate-dentate ; fls. in racemose, axillary, subsessile panicles; drwpes smooth, 
roundish.—Can. and U.S. A small shrub, 1—3f high, nearly smooth in all 
its parts. a 2—6’ long, % as wide, petiolate, the common petiole 4—5/ 
long. Flowers small, Q ¢. Drupes pale brown. Poisonous, but less so than 
the last. 
B. radicans. ‘Torr. (R.radicans. Linn. and of 1st edit.) Poison Ivy. St. 
climbing 3—20 or 50f! by myriads of radicating tendrils.—It seems now gen- 
erally conceded that this is but a variety. Certainly, if so, it is a very remark- 
able one. In damp, shady places. Poisonous. ing. 
6. R. anomatica. Ait. Sweet Sumac. 
Lfts. sessile, incisely crenate, pubescent beneath, lateral ones ovate, ter- 
minal one rhomboid; fs. in close aments, preceding the leaves; drupe globose, 
villous.—A small, aromatic shrub, 2—6f high, in hedges and thickets, Can. and 
U.S. Leaflets 1 2/ long, 4 as wide, sessile, the common petiole an inch or 
two in length. Flowers yellowish, with a 5-lobed, glandular disk. Drupes 
red, acid. May. 
* ** Leaves simple. 
7. R. Corinus. Venetian Sumac.—Lus. obovate, entire; /ls. mostly abor- 
tive; pedicels finally elongated and clothed with long hairs—A small shrub, 6f 
high, native in Ark. according to Nuttall, remarkable chiefly for the very sin- 
gular and ornamental appearance of its long, diffuse, feathery fruil-stalks, 
showing in the distance as if the plant were enveloped in a cloud of smoke. 
Flowers small, in terminal, compound panicles. Leaves smooth, entire, much 
rounded at the end. In Italy the plant is used for tanning. t 
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