6 KEY TO THE FAMILIES 



Staminodia wanting. 



Stigmas 2-cleft; plants insectivorous, with 

 glandular-hispid leaves. 



54. DROSERACEAE 372 



Stigmas entire; land plants, not insectiv- 

 orous; leaves not glandular-hispid. 

 Styles in ours distinct. 



Sepals persistent, united into a 

 tube; leaves not pellucid-dotted. 



84. FRANKENIACEAE 564 

 Sepals distinct; leaves pellucid- 

 dotted. 



82. HYPERICACEAE 563 



Styles wholly united. 



Corolla regular or nearly so; sta- 

 mens 8 or more. 

 Sepals and petals 4; the latter 

 nob fugaceous. 



53. CAPPARIDACEAE 370 



Sepals and petals 3 or 5; the 

 latter fugaceous. 



85. CISTACEAE 565 



Corolla irregular; one petal spurred ; 

 stamens 5. 



86. VlOLACEAE 565 



Ovary several-celled. 



Stamens adnate to the gynoecium. 



106. ASCLEPIADACEAE 669 



Stamens not adnate to the gynoecium. 



Stamens with wholly or partly united filaments. 



Anthers opening lengthwise; corolla regular. 



Leaves punctate; filaments polyadelphous, 



i e , united in three or more bundles. 



82. HYPERICACEAE 563 



Leaves not punctate; filaments monadel- 

 phous, i.e., united in a single bundle 

 Styles united around a central column 

 from which they break at matur- 

 ity. 66. GERANIACEAE 530 

 Styles distinct or permanently and 

 partly united; the tips and the 

 stigmas free. 

 Leaves simple; stamens 5. 



68. LlNACEAE 534 

 Leaves compound; stamens 10-15. 



67. OXALIDACEAE 533 



Anthers opening by pores; corolla irregular. 



73. POLYGALACEAE 540 



Stamens with distinct filaments. 

 Anthers united ; flowers irregular. 



69. BALSAMINACEAE 536 

 Anthers distinct; flowers regular or nearly so. 



Anthers opening by pores. 



Gynoecium superior; fruit usually cap- 



sular. 



Herbaceous saprophytes without 

 green leaves. 



97. MONOTROPACEAE 638 



Herbs with green leaves and root- 



stocks. 96. PYROLACEAE o3o 



Gynoecium inferior; fruit baccate or 

 drupaceous. 



99. VACCINIACEAE 

 Anthers opening by slits. 



Stigmas or styles distinct and clelt, 

 or foliaceous. 



74. EUPHORBIACEAE 541 



Stigmas or styles distinct or united, 



neither cleft nor foliaceous. 

 Style wanting; dwarf water plants. 



83. ELATINACEAE 564 



Styles present; not water herbs. 

 Stamens 2, rarely 3. 



101. OLEACEAE 655 



Stamens more than 3. 



Leaves punctate with trans- 

 lucent dots. 



72. RUTACEAE 539 



Leaves without translucent dots. 



