xxii 



177a. Flowers in small axillary clusters; foliage not spicy-aromatic 

 178. 



177b. Flowers in clusters terminating last year's twigs; foliage spicy- 

 aromatic Ib, 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 



Ib, in LAURACEAE, p. 41. 

 I81d. Petals 6; sepals also present 187. 



182a. Flowers in late spring or early summer 



2a, in CORNACEAE, p. 83. 

 182t>. 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 clusters 



2, in SAXIFRAGACEAE, p. 49. 

 185b. Flowers in branching clusters 186.-. 



186a. Leaves palmately lobed; stem thorny 



la, in ARALIACEAE, p. 80. 

 186b. Leaves not lobed; stem not thorny 



Ib, in RHAMNACEAE, p. 71. 



187a. Flowers dark red-purple ANONACEAE, p. 40. 



187b. Flowers yellow 2a, in BERBERIDACEAE, p. 40. 



