eaves with short petioles or sessile
24c, in =ERICACEAE=, p. 86.

121a. Lateral veins straight and parallel, mostly ending in the teeth of
the leaf --122.

121b. Lateral veins not straight and parallel --129.

122a. Leaves 2-ranked, i. e., in two longitudinal rows, with the
third leaf directly above the first --123.

122b. Leaves not 2-ranked --127.

123a. Leaves unsymmetrical, oblique at the base, i. e., with one side of
the leaf larger than the other =HAMAMELIDACEAE=, p. 51.

123b. Leaves symmetrical or nearly so at the base --124.

124a. Lateral leaf-veins ending in the leaf-teeth --125.

124b. Lateral veins not ending in the teeth
42b, in =ROSACEAE=, p. 55.

125a. Bark smooth and fluted on the large stems
1b, in =BETULACEAE=, p. 21.

125b. Bark rough or warty or glandular --126.

126a. Leaves 4 cm. long or less 3a, in =BETULACEAE=, p. 22.

126b. Leaves 5 cm. long or more 9b, in =BETULACEAE=, p. 22.

127a. Pith 3-angled 6a, in =BETULACEAE=, p. 22.

127b. Pith 5-angled 13b, in =FAGACEAE=, p. 23.

127c. Pith cylindrical --128.

128a. Leaves finely serrate 42b, in =ROSACEAE=, p. 55.

128b. Leaves coarsely or doubly serrate 41a, in =ROSACEAE=, p. 54.

129a. Leaves coarsely or doubly serrate --130.

129b. Leaves simply serrate --131.

130a. Leaves 2-ranked, i. e., in two longitudinal rows, with the
third leaf directly over the first
9b, in =BETULACEAE=, p. 22.

130b. Leaves not 2-ranked 41a, in =ROSACEAE=, p. 54.

131a. Leaves with glands on the petiole or at the base of the leaf-blade
--132.

131b. Leaves with small dark glands on the upper side of the mid-vein
42a, in =ROSACEAE=, p. 54.

131c. Leaves without glands --133.

132a. Willows; with usually slender leaves, frequently conspicuous
broad stipules, and lateral buds protected by a single
external bud-scale 13, in =SALICACEAE=, p. 20.

132b. Plums and cherries; with leaves lanceolate or broader, and
stipules minute and falling early in the season; lateral buds