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96b. Leaves deciduous --97.
97a. Stems or branches th.o.r.n.y --98.
97b. Stems or branches without thorns or th.o.r.n.y leaves --103.
98a. Leaves conspicuously palmately veined --99.
98b. Leaves pinnately veined, or sometimes with smaller lateral veins arising from the end of the petiole --100.
99a. Leaves 5 cm. wide or less 1a, in =SAXIFRAGACEAE=, p. 49.
99b. Leaves 15 cm. wide or more 1a, in =ARALIACEAE=, p. 80.
100a. Leaves entire 5a, in =SOLANACEAE=, p. 100.
100b. Leaves toothed or somewhat lobed --101.
101a. Leaves with bristly margins; some of the thorns three-pointed 2a, in =BERBERIDACEAE=, p. 40.
101b. Leaves not bristly on the margin; thorns not branched --102.
102a. Only lateral thorns present 41b, in =ROSACEAE=, p. 54.
102b. Only terminal thorns present 2a, in =RHAMNACEAE=, p. 71.
103a. Leaves palmately veined, or with one or more pairs of lateral veins from the base of the leaf --104.
103b. Leaves pinnately veined --111.
104a. Leaves entire --105.
104b. Leaves toothed --106.
104c. Leaves palmately lobed --108.
105a. Foliage fragrant when crushed; leaves ovate 1b, in =LAURACEAE=, p. 41.
105b. Foliage not aromatic; leaves heart-shape 3b, in =LEGUMINOSAE=, p. 58.
106a. Lateral veins straight and parallel, running to the teeth of the leaf 3a, in =BETULACEAE=, p. 22.
106b. Lateral veins curved or branched, and not running straight to the teeth --107.
107a. Tall shrubs with somewhat milky juice and broadly ovate leaves 2b, in =URTICACEAE=, p. 23.
107b. Low shrubs less than 1 m. high with watery juice 1b, in =RHAMNACEAE=, p. 71.
108a. Leaves with 2 or 3 entire lobes, spicy-fragrant when crushed 1b, in =LAURACEAE=, p. 41.
108b. Leaves with milky juice 2b, in =URTICACEAE=, p. 23.
108c. Leaves neither spicy-fragrant nor with milky juice --109.
109a. Stem covered with brown bristles 29, in =ROSACEAE=, p. 54.
109b. Stem not bristly --110.
110a. Sides of the petiole strongly decurrent on the stem; bundle-scars crowded or nearly in contact in the leaf-scars 28b, in =ROSACEAE=, p. 53.
110b. Sides of petiole little decurrent or not at all; bundle-scars distinctly separate 2b, in =SAXIFRAGACEAE=, p. 49.
111a. Leaves aromatically fragrant when crushed --112.
111b. Leaves not aromatically fragrant when crushed --113.
112a. Leaves broadly obovate, entire; a common woodland shrub 1a, in =LAURACEAE=, p. 41.
112b. Leaves linear-lanceolate or oblanceolate, conspicuously toothed or entire =MYRICACEAE=, p. 20.
113a. Leaves entire --114.
113b. Leaves toothed or lobed --121.
114a. Base of the petiole covering the axillary buds; twigs marked with rings =THYMELAEACEAE=, p. 77.
114b. Base of petiole not covering the bud, and twigs not marked with rings --115.
115a. Pith with prominent part.i.tions; tall shrubs with fetid bark; leaves obovate, 10 cm. long or larger =ANONACEAE=, p. 40.
115b. Pith not part.i.tioned; leaves smaller --116.
116a. Leaves waxy or resinous underneath 24b, in =ERICACEAE=, p. 86.
116b. Leaves not waxy or resinous --117.
117a. Lateral veins curved forward and almost parallel to the margin of the leaf 2a, in =CORNACEAE=, p. 83.
117b. Lateral veins spreading --118.
118a. Leaves lanceolate or linear, much longer than wide --119.
118b. Leaves ovate or elliptical --120.
119a. Stem weak, spreading or trailing 5a, in =SOLANACEAE=, p. 100.
119b. Stems, or some of them, erect 3b, in =LEGUMINOSAE=, p. 58.
120a. Leaves with purple petioles, which are at least one-fourth as long as the leaf-blade 1a, in =AQUIFOLIACEAE=, p. 69.
