KEY TO THE FAMILIES. 13. 



6, hypogynous. Ovary cells 2. (Lepidium). 



54 CRUCIFERAE. 



Stamens perigynous. ... 43 AIZOACEAE. 



82. (73) Flowers unisexual or polygamous. 83. 

 Flowers hermaphrodite. 87. 



83. Style 1 with 2 — 6 stigmas. Leaves alternate exstipulate. 



89 SAPINDACEAE. 

 Styles 2 or more free or partly united. 84. 



84. Perianth segments valvate in bud united below. Filaments 



united. (Cola) 86 STERCULIACEAE. 



Perianth segments imbricate or open in bud. If valvate, then 



filaments free. 85. 



85. Fruit a berry or drupe. Stamens 10 or more. Leaves alter- 



nate. 100 FLACOURTIACEAE. 



Fruit capsular or separating into mericarps. 86. 



86. Raphe dorsal. Leaves opposite exstipulate. Stamens 6. 



Shrub (Notobuxus). 82 BUXACEAE. 



Raphe ventral. 80 EUPHORBIACEAE. 



87. (82) Ovary long stalked. Seeds exendospermic. 



55 CAPP ARID ACE AE. 

 Ovary short stalked or sessile. 88. 



88. Stem herbaceous or woody at base only. 89. 

 Stem woody throughout. 91. 



89. Style 1 or 1 sessile stigma. Seeds exendospermic. 



107 LYTHRACEAE. 

 Styles or sessile stigmas 2 — 5. 90. 



90. Stamen 1. Ovary 3 celled styles 3. Water plant (Tristicha). 



58 PODOSTEMONACEAE. 

 Stamens more than 1. Not water plants. 



43 AIZOACEAE. 



91. Perianth segments united. (See 89). 107 LYTHRACEAE. 

 Perianth segments free or nearly so. Stamens hypogynous or 



nearly so. 92. 



92. Perianth segments 5 valvate in the bud. (Grewia). 



94 TILIACEAE. 

 Perianth segments 3 — 8, imbricate or open in the bud. 



100 FLACOURTIACEAE. 



93.' (43) Ovules 2 or more in each carpel. 96 STERCULIACEAE. 



Ovule 1 in each carpel. 94. 



94. Ovule erect. Perianth regular 4 — 5 parted. Fruit succulent. 



Leaves undivided exstipulate. (Phytolacca). 



92 PHYTOLACCACEAE. 

 Ovule pendulous, or if erect, perianth irregular. 95. 



95. Perianth segments united at least in the female flowers. 



Stamens perigynous. 67 ROSACEAE. 



