Family Key 9 
GROUP 3—Trees and shrubs with opposite leaves 
A. Leaves compound. 
B. Plants vine-like, climbing by their petioles; fruit a head of akenes with plumose 
tails. Clematis in RANUNCULACEAE (p. 162) 
BB. Plants not vine-like, not at all climbing; fruit not as above. 
C. Leaflets entire or very nearly so; fruit 1-winged. OLEACEAE (p. 304) 
CC. Leaflets serrate or toothed; fruit either 2-winged or a berry. 
D. Leaflets serrate with close regular equal projections; fruit a berry, not winged. 
Sumbucus in CAPRIFOLIACEAE (p. 364) 
DD. Leaflets toothed or lobed with irregular unequal projections; fruit dry, 
2-winged. ACERACEAE (p. 249) 
AA. Leaves simple. 
FE. Leaves palmately veined, or with 3 or more large veins from the base. 
F. Vines, climbing by tendrils. VITACEAE (p. 251) 
FF. Not vines, erect or spreading. 
G. Leaves palmately lobed. 
H. Fruit a red drupe, not winged; flowers in cymes; shrubs 6—30 dm. high. 
Viburnum in CAPRIFOLIACEAE (p. 364) 
HH. Fruit dry, 2-winged; flowers in racemes or fascicles; shrubs or trees. 
ACERACEAE (p. 249) 
GG. Leaves not palmately lobed altho sometimes coarsely dentate. 
I. Leaves acute; stipules none; petals distinct to base; fruit a capsule. 
HyYDRANGEACEAE (p. 203) 
IJ. Leaves rounded at both ends; stipules present; petals united at base; fruit 
a drupe. Viburnum in CAPRIFOLIACEAE (p. 364) 
EE. Leaves pinnately veined, with only | large vein from the base. 
J. Plants parasitic on trees; leaves entire, often scale-like. 
LORANTHACEAE (p. 128) 
Ji. Plants not parasitic; leaves entire or not entire, usually not scale-like. 
K. Leaves densely scurfy at least beneath. ELEAGNACEAE (p. 259) 
KK. Leaves not scurfy. 
L. Plants hoary, 3—6 dm. high, erect; bark ashy-gray, shreddy; leaves 2.5 
cm. or less long, entire, obtuse or retuse, spatulate to obovate. 
Ramona in MENTHACEAE (p. 331) 
LL. Plants not hoary, often taller or vine-like; bark not as above; leaves 
various. 
M. Leaves scale-like, 2—4 mm. long; plants 3 dm. or less high, erect 
or ascending. Cassiope in ERICACEAE (p. 294) 
MM. Leaves not scale-like, mostly longer; plants various. 
N. Small creeping vine with mint odor. 
Micromeria in MENTHACEAE (p. 331) 
NN. Eeither not a vine or one without mint odor. 
O. Vines, twining or merely creeping. CAPRIFOLIACEAE (p. 364) 
OO. Not vines, erect or decumbent. 
P. Petals united; leaves entire or coarsely lobed. 
Q. Plants of peat bogs; leaf-margin revolute; ovary superior; 
fruit dry. Kalmia in ERICACEAE (p. 294) 
QQ. Not plants of peat bogs; leaf-margin plane. 
R. Ovary inferior; stamens all anther-bearing, as many as 
the corolla-lobes; either fruit berry-like or plant creeping. 
CAPRIFOLIACEAE (p. 364) 
RR. Ovary superior; anther-bearing stamens | fewer than 
