lmately veined --49.
48b. Leaves pinnately veined --51.
49a. Lobes of the leaf entire 1b, in =LAURACEAE=, p. 41.
49b. Lobes of the leaf serrate --50.
50a. Juice somewhat milky; lateral buds visible
2b, in =URTICACEAE=, p. 23.
50b. Juice not milky; lateral buds covered by the base of the
petiole =PLATANACEAE=, p. 51.
51a. Leaves with 4 large entire lobes; stem marked with a ring at each
node =MAGNOLIACEAE=, p. 40.
51b. Leaves with many lobes; stem not ringed 1b, in =FAGACEAE=, p. 22.
--52--
52a. For specimens bearing leaves only --53.
52b. For specimens bearing flowers only --140.
52c. For specimens with both leaves and flowers --155.
53a. Leaves narrow, needle-like or scale-like, mostly evergreen --54.
53b. Leaves broader, flat or rolled, but not needle-like or scale-like
--56.
54a. Foliage densely gray-pubescent; low bushy shrubs with yellow
flowers 2a, in =CISTACEAE=, p. 74.
54b. Foliage green --55.
55a. Leaves opposite or whorled =PINACEAE=, p. 1.
55b. Leaves scattered on the stem =TAXACEAE=, p. 2.
56a. Twining or climbing vines --57.
56b. Not climbing or twining --66.
57a. Thorny vines --58.
57b. Not thorny --60.
58a. Climbing by tendrils at the base of the leaves
4b, in =LILIACEAE=, p. 11.
58b. Tendrils none --59.
59a. Leaves simple 5a, in =SOLANACEAE=, p. 100.
59b. Leaves compound 8a, in =ROSACEAE=, p. 52.
60a. Leaves compound --61.
60b. Leaves simple --63.
61a. Leaves with 5 leaflets 1a, in =VITACEAE=, p. 71.
61b. Leaves with 3 leaflets --62.
62a. Plant climbing by tendril-like leaf-stalks
1a, in =RANUNCULACEAE=, p. 35.
62b. Plant climbing by hold-fast roots
5b, in =ANACARDIACEAE=, p. 69.
63a. Leaves opposite 5a, in =CAPRIFOLIACEAE=, p. 110.
63b. Leaves alternate --64.
64a. Plants climbing by tendrils 1b, in =VITACEAE=, p. 71.
64b. Twining plants --65.
65a.
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