14. Sap always milky; stigma massive and united to anther-tissue and often to 



some corolla-tissue to form a "crown" or gynostegium" 



110. Asclepiadaceae, p. 1339 



15(13). Leaves pinnately twice-compound 74. Leguminosae, p. 1039 



15. Leaves simple to pinnately once-compound or palmately compound (16) 



16(15). Anthers more than 3 times as numerous as the petals (or as the corolla 

 lobes) (17) 



16. Anthers numbering from 3 times as numerous as the petals or corolla lobes to 



as few as 2 per flower (19) 



17(16). Filaments either coalescent to form a tube or at least coalescent at base 

 87. Malvaceae, p. 1113 



17. Filaments not coalescent (18) 



18(17). Herbs with deeply dissected leaves and highly zygomorphic flowers 



61. Ranunculaceae, p. 913 



18. Woody plants with mostly entire leaves and actinomorphic flowers 



105. Symplocaceae, p. 1301 



19(16). Stamens (6 or) 7 to 18, usually precisely 2 or 3 times as numerous as 

 the petals or corolla lobes (20) 



19. Stamens 2 to 5 (or very rarely 6), as many as the petals or corolla lobes or 



fewer than them (24) 



20(19). Carpels free, equal in number to the calyx segments or corolla lobes, 

 each maturing into a follicle 69. Crassulaceae, p. 994 



20. Carpels coalescent into a compound pistil (21 ) 



21(20). Petals typically 3; flowers extremely zygomorphic; stamens 8 or rarely 

 6 51. Polygalaceae, p. 1074 



21. Petals or corolla lobes 4 to 7; flowers only slightly if at all zygomorphic; sta- 



mens (6 or) 7 to 18 (22) 



22(21). Anthers often with little hornlike appendages and dehiscing by apical 

 slits, clefts or pores 101. Ericaceae, p. 1267 



22. Anthers unappendaged, usually opening longitudinally (23) 



23(22). Woody plants with stellate or lepidote vestiture 



104. Styracaceae, p. 1296 



23. Plants herbaceous, vestiture absent or else not stellate nor lepidote 



78. Euphorbiaceae, p. 1082 



24(19). Ovule viviparous, i.e., germinating while still on the parent-plant; 

 opposite-leaved mangrovelike small rhizomatous shrubs growing on 

 salty mud flats along the Texas coast.... 115. Avicenniaceae, p. 1392 



24. Ovule not viviparous; plants not growing in salty mud or if so then not 



shrubby (25) 



25(24), Fruit an incompletely celled capsule (i.e., 1-celled with incomplete par- 

 titions), dehiscing apically 58. Caryophyllaceae, p. 884 



25. Fruit otherwise, if capsular then dehiscing differently (26) 



26(25). Fruit a circumscissile capsule; herbs with leaves nearly all basal and 



flowers in dense spikes terminating the scapes 



123. Plantaginaceae , p. 1533 



26. Fruit not a circumscissile capsule or if so then habit otherwise (27) 



25 



