xxvi INTRODUCTION 



i. Calyx tube grown to the 



ovary ; fruit 2-seeded APIACEAE 223 

 s. Ovary 1-celled 

 (r) Sepals 5 



h. Ovary superior 

 (h) Styles 2 

 k. Pistils 2 at top, open- 

 ing on the inner 



face SAXIFRAGACEAE 191 



1. Capsule opening by 4 



teeth CARYOPHYLLACEAE 



43 



(i) Styles 3-5 

 k. Stamens usually twice 

 as many as the 

 petals CARYOPHYLLACEAE 



43 



1. Stamens numerous HYPERICACEAE 42 

 i. Ovary inferior; stamens 



many LOASACEAE 209 



(s) Sepals 2 



h. Stamens 3-20 PORTULACACEAE 48 



i. Stamens many PAPAVERACEAE 9 



(b) Flowers irregular 

 x. Flowers spurred or hooded 



(x) Sepals green VIOLACEAE 29 



(y) Sepals petal-like RANUNCULACEAE 1 



y. Flowers not spurred 



(x) Petals of 3 shapes FABACEAE 168 



(y) Petals somewhat irregular CASSIACEAE 167 



b. Petals united 



(1) Ovary superior 



(a) Low, usually evergreen shrubs ERICACEAE 83 



(b) Herbs 



x. Ovary 1-celled 

 (x) Carpels 2 

 m. Leaves entire, opposite 



(m) Flowers irregular MARTYNIACEAE 141 



(n) Flowers regular GENTIANACEAE 93 



n. Leaves toothed, lobed or compound 



