190 ARBORETUM ET FRUTICETUM BRITANNICUM. 
much smaller in all its parts. The leaflets are about 2in. long, and 4in. wide, 
of a pale green, serrated, and in general appearance resembling the leaves of 
the common elm. Culture as in 2. typhina. 
% 6, R. copatyi'va Lin. The Gum Copal Rhus, or Mastich-tree-leaved 
Sumach, 
Identification. Lin. Spec.,380.; Dec. Prod., 5. p.68.; Don’s Mill., 2. p. 72.5 Tor. and Gray, 1. p. 217. 
Engravings. Jacq. Hort. Schon., t. 341.; Pluk. Alm., p. 56.f.1.; and our jig. 287. 
Spec. Char., $c. Leaf glabrous above, a little pilose beneath, of 5—7 pairs 
of leaflets, and the odd one; leaflets lanceolate and entire. Petiole winged 
and jointed. Root stoloniferous. Flowers yellow green. Sexes dicecious. 
(Dec. Prod.) A deciduous shrub. Canada to Florida. Height 3 ft. to 8 ft. 
Introduced in 1688. Flowers yellowish green; July and August Berries 
red ; ripein September. Decaying leaves purplish red. 
Varieties. Three forms are given by Torrey and Gray:— a, Leaflets entire, 
usually acuminate, which may be considered as the species : 3, leaflets 
coarsely and unequally serrate: and y, leaflets (about 21) small, oblong, 
acute at the base; obtuse and slightly mucronate at the apex; petiole nar 
rowly winged. Jacquin has 
& R. c. 2 leucdntha Jac. Hort. 
Schén., t.342.—Root not 
stoloniferous. Panicles more 
contracted than in the 
species. 
The leaves and general habit of 
the plant are those of R. typhina, 
out it seldom grows to the height of 
more than 4 or 5 feet in British 
gardens. The branches are smooth, 
and the leaflets entire with acute 
points; they are light green on both 
sides, and in autumn change to a fine 
purple. The petiole, as in 2. Cori- 
aria, is somewhat winged towards its 
tip, which, with other circumstances, 
induces us to think that they may both 
be varieties of the same species. The 
leaves are used as tobacco by the 287. Rhis copallina. 
Indians of the Missouri and the Mississippi. 
* & 7. R. ToxicopE’npRon L. The Poison-Tree Rhus, or Sumach, 
Identification. Tor. and Gray, 1. p. 218. : 
Synonymes. R. Toxicodéndron, and £. radicans L., Dec., Don’s Miil., §c. 
mgraving. Our fig. 000. in p. 000. 
Spec. Char., §c. Stem erect, decumbent, or climbing by radicles. Leaves 3- 
foliolate, somewhat pubescent ; leaflets (membranaceous) broadly oval or 
rhomboid, acuminate, entire or toothed, the Jateral ones inequilateral. Pa- 
nicles racemed, axillary, subsessile. Drupe subglobose, smooth. (Torrey and 
Gray.) A low rambling or climbing shrub. Canada to Georgia, in shady 
damp places. Stems 10 ft. to 20 ft. as a climber; or 3 ft. to 5 ft. high as a 
bush. Introduced in 1640. Flowers greenish, mostly dicecious; June and July. 
Berry pale chestnut; ripe in September. Decaying leaves purplish red. 
Varieties. The following forms are given by Torrey and Gray :— 
xR. T.1 quercifolium Tor. & Gray. &. T. 6 quercifolium Miche. — Not 
climbing ; leaves entire, or variously and irregularly sinuatedly 
toothed, or lobed. The #. Toxicodéndron of the London gardens, 
readily distinguished from the two following varieties, by its deeply 
sinuated, or almost pinnatifid, leaflets. It grows to the height of 
