KEY TO THE FAMILIES. ix 



Corolla regular or nearly so. 

 Ovule 1. 



Shrubs or trees. ANACARDIACEAE, 158. 



Herbs. CRUCIFERAE, 113. 



Ovules more than 1. 



Placenta central or basal CARYOPHYLLACEAE, 95. 

 Placentae parietal. 



Leaves punctate with 



pellucid dots. HYPERICACEAE, 163. 



Leaves not punctate. 



Petals 4. CAPPARIDACEAE, 123. 



Petals 5. SAXIFRAGACEAE, 125. 



Ovary 2-several-celled. 



Stamens neither just as many 

 nor twice as many as the 

 petals. 



Stamens 6, tetradynamous. CRUCIFERAE, 113. 

 Stamens 5, regular. BALSAMINACEAE, 160. 



Stamens either just as many 

 or twice as many as the 

 petals. 

 Ovules 1 or 2 in each cell 



of the ovary. 

 Herbs. 



Cells of the fruit 5. GERANIACEAE, 154. 

 Cells of the fruit 10. LINACEAE, 155. 

 Shrubs or trees. 



Low pinnately- 



veined shrubs. CELASTRACEAE, 159. 

 Palmately-veined 



trees. ACERACEAE, 159. 



Ovules several to many in 

 each cell of the ovary. 

 Leaves opposite, with 



stipules. ELATINACEAE, 164. 



Leaves, when opposite, 



without stipules. 

 Stamens on the calyx. 



Style 1. LYTHRACEAE, 167. 



Styles 2-3. SAXIFRAGACEAE, 125. 



Stamens free from 



the calyx. 



Style 1. PYROLACEAE, 185. 



Styles 2-5. 



Stamens and 

 calyx free 

 from the 



ovary. CARYOPHYLLACEAE, 95. 



Stamens and 

 calyx 

 united to 



the ovary. ARALIACEAE, 175. 

 Ovary at least half inferior. 



Ovules and seeds more than one in each cell 



of the ovary. ONAGRACEAE, 168. 



Ovules and seeds but one in each cell of the 

 ovary. 



