INTRODUCTION 



i. Calyx tube grown to the 

 ovary ; fruit 2-seeded 

 Ovary 1 -celled 

 (r) Sepals 5 



h. Ovary superior 

 (h) Styles 2 

 k. Pistils 2 at top, open- Saxifragaceae 191 

 ing on the inner 



face Caryophyllaceae 



1. Capsule opening by 4 43 

 teeth 



(i) Styles 3-5 

 k. Stamens usually twice Caryophyllaceae 

 as many as the 43 

 petals Hypericaceae 42 



1. Stamens numerous 

 i. Ovary inferior ; stamens 

 many 

 (s) Sepals 2 

 h. Stamens 3-20 

 i. Stamens many 

 (b) Flowers irregular 

 x. Flowers spurred or hooded 

 (x) Sepals green 

 (y) Sepals petal-like 

 y. Flowers not spurred 

 (x) Petals of 3 shapes 

 (y) Petals somewhat irregular 

 b. Petals united 



(1) Ovary superior 



(a) Low, usually evergreen shrubs 



(b) Herbs 



x. Ovary 1-celled 

 (x) Carpels 2 

 m. Leaves entire, opposite 

 (m) Flowers irregular 

 (n) Flowers regular 

 n. Leaves toothed, lobed or compound 



Loasaceae 209 



portulacaceae 48 

 Papaveraceae 9 



VlOLACEAE 29 



Ranunculaceae 1 



Fabaceae 168 

 Cassiaceae 167 



Ericaceae 83 



Martyniaceae 141 

 Gentianaceae 93 



apia.ceae 223 



