90 TREES OF THE NORTHERN UNITED STATES 
1. Rhis typhina, L. (Stag-HORN Sv- 
MAC.) Leaflets 11 to 31, oblong-lanceo- 
late, pointed, serrate (rarely laciniate), 
pale beneath. Branches and footstalks 
densely hairy. Fruit globular, in large, 
dense, erect panicles, covered with crim- 
son hairs. Shrub or tree, 10 to 30 ft. 
high. It is very common along fences 
and on hillsides. The wood is orange- 
RB. typhina. colored and brittle. 
2. Rhis glabra, L. (SmMootTH Su- 
mac.) Leaflets 11 to 31, lanceolate- 
oblong, pointed, serrate, smooth, glau- 
cous white beneath. Branches not . 
hairy. Fruit globular, in a rather open, 
spreading cluster, covered densely with 
crimson hairs. A shrubby plant, 2 to 
12 ft. high, found quite abundantly in 
rocky or barren soil throughout. 
Var. laciniata is frequently planted 
for ornament. It has very irregularly 
twice-pinnate leaves drooping grace- 
fully from the branches. 
R. glabra. 
3. Rhits copallina, L. (DwarFr Moun- 
TAIN Sumac.) Branches and stalks downy; 
leafstalk wing-margined between the 9 to 
21 oblong-lanceolate, usually entire leaf- 
lets, which are oblique at base and smooth 
and shining above. Wild in rocky hills 
throughout; often cultivated. North, a 
beautiful shrub ; 
south, a tree. 2 
to 25 ft. high. 
4, Rhis ve- 
nenata, DC. 
(POIsON-SUMAC. 
R. laciniata. POISON-DOG- 
WOOD. POISON-ELDER.) Leaflets 7 to 13, 
obovate-oblong, entire, abruptly pointed, 
smooth or nearly so. Fruit small, globu- 
lar, smooth, dun-colored, in loose axillary 
