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.