6 KEY TO THE FAMILIES 



Staminodia wanting. 



Stigmas 2-cleft; plants insectivorous, with 

 glandular-hispid leaves. 



.54. Droser.\ce.\E 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. Frankeniace.xe 564 

 Sepals distinct; leaves pellucid- 

 dotted. 



82. Hypericace.ve 563 



Styles wholly united. 



Corolla regular or nearly so; sta- 

 mens 8 or more. 

 Sepals and petals 4; the latter 

 not fugaceous. 



53. Capparidaceae 370 



Sepals and petals 3 or 5; the 

 latter fugaceous. 



85. Cistaceae 565 

 Corolla irregular ; one petal spurred ; 



stamens 5. 



86. VIOLACEAE 665 

 Ovary several-celled. 



Stamens adnate to the gynoeciura. 



106. Asclepiadaceae 669 



Stamens not adnate to the gjTioecium. 



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. Hypericac'eae 563 



Leaves not punctate; filaments monadel- 

 phous, /. c, united in a single bundle 

 Styles unitied 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. LiNACEAE 534 

 Leaves compound; stamens 10-15. 



67. OXALIDACEAE 533 



Anthers opening by pores ; corolla irregular. 



73. POLYGAL.\^CEAE 540 



Stamens with distinct filaments. 

 Anthers united; flowers irregular. 



69. B.\LS^VMINACE.\E 536 



Anthers distinct ; flowers regular or nearly so. 

 Anthers opening by pores. 



Gynoecium superior; fruit usually cap- 

 sular. 

 Herbaceous saprophj'tes without 

 green leaves. 



97. MONOTROPACEAE 638 



Herbs with green leaves and root- 

 stocks. 96. Pyrolaceae 635 

 Gynoecium inferior; fruit baccate or 

 drupaceous. 



99. V.^CCINIACEAE 643 



Anthers opening by slits. 



Stigmas or styles distinct and cleft, 

 or foliaceous. 



74. Euphorbiaceae 541 

 Stigmas or styles distinct or united, 



neither cleft nor foliaceous. 

 Style wanting; dwarf water plants. 



83. El.,.\TINACEAE 564 



Styles present; not water herbs. 

 Stamens 2, rarely 3. 



101. Oleace.\e 655 



Stamens more than 3. 



Leaves punctate with trans- 

 lucent dots. 



72. RUTACEAE 539 



Leaves without translucent dots. 



