KEY TO THE FAMILIES 



Pistils several, more or less united around a 

 central axis, elastically separating as 1-seeded 

 carpels. 

 Pistil 1. 



Corolla regular. 

 Ovary 1-celled. 



Anthers opening by longitudinal slits. 



Fruit a capsule dehiscent at the apex 

 by valves or teeth. 

 Placentae central or basal. 



Calyx tubular or of 4-5 distinct 



Calyx of 2 distinct sepals. 

 Placentae parietal; calyx tubular. 

 Fruit indehiscent; sepals and petals 4. 

 Anthers opening by uplifted valves; 

 shrubby plants. 

 Ovary more than 1-celled. 

 Herbs. 



Leaves opposite. 



Calyx of 2 distinct sepals. 

 Calyx tubular. 

 Leaves alternate or basal. 



Sepals and petals 4; stamens 6, 

 sometimes 2 or 4. 

 Ovary 1-celled, stipitate. 

 Ovary 2-celled, not stipitate. 

 Sepals and petals 5; capsule 5-celled. 

 Stamens 10; leaves compound. 

 Leaves 3-foliolate. 

 I.,eaves pinnate. 



Ovule 1 in each cell. 

 Ovules 3-5 in each cell. 

 Stamens 5 ; leaves entire. 

 Shrubs or trees. 



Petals and sepals 4; stamens 6; ovary 



stipitate. 

 Petals and stamens 2; fruit a simple 

 samara. 

 Corolla irregular. 



Corolla papilionaceous or papilionaceous-like. 

 Stamens 10; diadelphous or monadelphous; 



corolla papilionaceous. 

 Stamens 6-8, monadelphous; petals 3, 

 papilionaceous-like. 

 Corolla not papilionaceous. 



Stamens 5; petals 5, 1 spurred; sepals 



auricled. 

 Stamens 6; sepals 2; petals 4, in 2 dis- 

 similar pairs. 



Geraniaceae, 207. 



Caryophyllaceae, 130. 

 portulacaceae, 128. 

 Franfceniaceae, 231. 

 Brassicaceae, 149. 



Berberidaceae, 142. 



Elatinaceae, 231. 



SiLENE, 131. 



Capparidaceae, 163. 

 Brassicaceae, 149. 



OXALIDACEAE, 208. 



Limnanthaceae, 217. 

 Zygophyllaceae, 217. 

 Linaceae, 209. 



isomeris, 163. 

 Fraxinus, 277. 



Fabaceae, 187. 



POLYGALACEAE, 210. 



Violaceae, 233. 



BiCUCULLA, 148. 



2. Stamens Perigynous. 



Stamens on an hypogynous disk or on a disk lining 

 the base of the calyx. 

 Herbs; disk 1-sided. 

 Trees or shrubs. 



Stamens equaling the petals in number and 

 opposite them. 

 Shrubs; petals commonly hooded; ovary 



usually 3-celled. 

 Woody vines climbing by tendrils; petals 

 early deciduous. 

 Stamens exceeding the petals in number. 

 Fruit drupe-like; styles or stigmas 3. 

 Fruit a double samara; leaves simple. 

 Stamens on the calyx. 



Corolla irregular; fruit a legume. 

 Corolla regular. 



Stamens more than 10; pistils 1-many. 



Resedaceae, 164. 



Rhamnaceae, 221. 

 Vitaceae, 226. 

 Anacardiaceae, 218. 



AcERACEAE, 220. 



Fabaceae, 187. 



