164b. Stamens 4 or 5 11, in =CAPRIFOLIACEAE=, p. 110.
164c. Stamens 10 18a, in =ERICACEAE=, p. 85.
165a. Leaves once-compound --166.
165b. Leaves simple --172.
165c. Leaves twice- or thrice-compound 4a, in =ARALIACEAE=, p. 80.
166a. Flowers small, greenish or greenish-yellow --167.
166b. Flowers conspicuous, white, or brightly colored --170.
167a. Stems th.o.r.n.y 1a, in =RUTACEAE=, p. 65.
167b. Stems not th.o.r.n.y --168.
168a. Leaflets 3, entire or minutely toothed 1b, in =RUTACEAE=, p. 65.
168b. Leaflets 3, conspicuously toothed 1b, in =ANACARDIACEAE=, p. 68.
168c. Leaflets more than 3 --169.
169a. Leaflets entire except for 1-4 large glandular teeth near their base =SIMARUBACEAE=, p. 65.
169b. Leaflets entire, or toothed for their entire length =ANACARDIACEAE=, p. 68.
170a. Flowers with a single bright-blue petal 8a, in =LEGUMINOSAE=, p. 58.
170b. Flowers with several petals --171.
171a. Flowers regular 3, in =ROSACEAE=, p. 51.
171b. Flowers irregular, the upper petal the largest 4, in =LEGUMINOSAE=, p. 58.
172a. Leaves minute, scale-like, appressed 2a, in =CISTACEAE=, p. 74.
172b. Leaves 3-10 mm. long, spreading, completely rolled into a tube =EMPETRACEAE=, p. 68.
172c. Leaves normal in shape, green in color --173.
173a. Leaves evergreen, as shown by their presence on the older parts of the stem 4b, in =ERICACEAE=, p. 84.
173b. Leaves deciduous --174.
174a. Flowers in catkins, without petal-like parts --142.
174b. Flowers not in catkins, either with or without petal-like parts --175.
175a. Flowers small, inconspicuous, yellowish or greenish in color --176.
175b. Flowers white or colored, with conspicuous petals --180.
176a. Leaves broad and palmately lobed; stem th.o.r.n.y 1a, in =ARALIACEAE=, p. 80.
176b. Leaves entire, toothed, or with 2-3 entire lobes; stem not th.o.r.n.y --177.
177a. Flowers in small axillary cl.u.s.ters; foliage not spicy-aromatic --178.
177b. Flowers in cl.u.s.ters terminating last year"s twigs; foliage spicy-aromatic 1b, in =LAURACEAE=, p. 41.
178a. Petals none; sepals present 2b, in =RHAMNACEAE=, p. 71.
178b. Petals present but small --179.
179a. A stamen in front of each petal 2a, in =RHAMNACEAE=, p. 71.
179b. A stamen between each two petals =AQUIFOLIACEAE=, p. 69.
180a. Petals united with each other; stamens 8-10 24, in =ERICACEAE=, p. 86.
180b. Petals separate from each other --181.
181a. Petals 4 --182.
181b. Petals 5 --183.
181c. Petal-like sepals 6; real petals none; foliage spicy-aromatic 1b, in =LAURACEAE=, p. 41.
181d. Petals 6; sepals also present --187.
182a. Flowers in late spring or early summer 2a, in =CORNACEAE=, p. 83.
182b. Flowers in autumn =HAMAMELIDACEAE=, p. 51.
183a. Corolla irregular, the upper petal largest 3b, in =LEGUMINOSAE=, p. 58.
183b. Corolla regular, all petals alike in size and shape --184.
184a. Stamens 5 --185.
184b. Stamens 10 or more 24, in =ROSACEAE=, p. 53.
185a. Flowers in loose racemes or axillary cl.u.s.ters 2, in =SAXIFRAGACEAE=, p. 49.
185b. Flowers in branching cl.u.s.ters --186.
186a. Leaves palmately lobed; stem th.o.r.n.y 1a, in =ARALIACEAE=, p. 80.