KEY TO THE FAMILIES. 



XI 



II. Petals More or Less United into One Piece. 



Stamens more numerous than the corolla-lobes. 

 Ovary 1-celled. 



White or reddish chlorophyll-less parasitic 



or saprophytic herbs. 

 Green chlorophyll-bearing herbs, not para- 

 sitic nor saprophytic. 

 Ovary with 1 parietal placenta. 

 Ovary with 2 parietal placentae. 

 Ovary 3-many-celled. 



Stamens united with the base of the corolla. 

 Stamens free from the corolla. 



Chlorophyll-less parasitic or saprophytic 



herbs. 

 Chlorophyll-bearing herbs, not parasitic 

 nor saprophytic. 

 Stamens as many as the corolla-lobes or fewer. 

 Stamens opposite the corolla-lobes. 



Style 1; fruit a several to many-seeded 



capsule. 

 Styles 5; fruit a 1-seeded utricle. 



Pyrolaceae, 270. 



Leguminosae, 212. 

 Papaveraceae, 164. 



Malvaceae, 238. 



Pyrolaceae, 270. 

 Ericaceae, 275. 



Primulaceae, 283. 

 Plumbaginaceae, 286. 



