KEY TO THE FAMILIES. 



Carpels S; stipules present. 



Carpels 2-4; stipules none. 



Ovary neither lobed nor beaked. 



Ovary simple with 1 parietal placenta. 

 Ovary compound, as shown by the 

 number of cells, placentae, 

 styles or stigmas. 

 Ovary 1-celled. 



Corolla irregular. 



Stamens 6; petals 4. 

 Stamens and petals 5. 

 Corolla regular or nearly so. 

 Ovule 1. 



Shrubs or trees. 

 Herbs. 

 Ovules more than 1. 



Placenta central or 



basal. 

 Placentae parietal. 

 Leaves punctate 

 with pellucid dots. 

 Leaves not punc- 

 tate. 

 Plants not green, 

 parasitic or 

 saprophytic. 

 Plants green, 

 neither 

 parasitic 

 nor sapro- 

 phytic. 

 Leaves with 

 bristly 

 glandular 

 hairs, 



forming in- 

 sect traps. 

 Leaves with- 

 out bristly 

 glandular 

 hairs. 

 Ovary 2-several-celled. 



Stamens neither just as many 

 nor twice as many as the 

 petals. 

 Trees or shrubs. 

 Stamens 2. 



Stamens more than 2. 

 Herbs. 



Stamens 6, tetradyna- 



mous. 

 Stamens 5, regular. 

 Stamens either just as many 

 or twice as many as the 

 petals. 

 Ovules 1 or 2 in each cell 

 of the ovary. 



Geraniaceae, 228. 



LlMNANTHACEAE, 232. 



Leguminosae, 212. 



Papaveraceae, 164. 



VlOLACEAE, 241. 



Anacardiaceae, 233. 

 Cruciferae, 166. 



Caryophyllaceae, 141. 

 Hypericaceae, 239. 



Pyrolaceae, 270. 



Droseraceae, 182. 



Saxifragaceae, 184. 



Oleaceae, 287. 

 Aceraceae, 235. 



Cruciferae, 166. 

 Balsaminaceae, 236. 



