12 KEY TO THE FAMILIES 



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 156 



Leaves not punctate; filaments monadel- 

 phous, i. e., united in a single b^lndle 

 Styles unifeed around a central column 

 from which they break at matur- 

 ity. 66. GER.\XIACE.iE 148 

 Styles distinct or permanently and 

 partly united ; the tips and the 

 stigmas free. 

 Leaves simple; stamens 5. 



118, Ll.VACEAE 149 



Leaves compound; stamens 10-13. 



67. OXALIDACEAE 149 



Anthers opening by pores; corolla irre.?ular. 



7.3. POLYGALACEAE l.')0 



stamens with distinct filaments. 

 Anthers united; floners irregular. 



69. Bals\mixaceae ^ 149 

 Anthers distinct; flowers regular or nearly so. 

 Anthers opening by pores. 



Gynoecium superior; fruit usually cap- 

 sular. 

 Herbaceous saprophytes without 

 green leaves. 



97. MON'OTROPACEAE 1/4 



Herbs with green leaves and root- 

 .stocks, 96. Pyrolace.ve 174 



Gynoecium inferior; fruit baccate or 

 drupaceous. 



99. V.ACCIXI.ICEAE 176 



Anthers opening by slits. 



Stigmas or styles distinct and cleft, 

 or foUaceous. 



74. EUPnORBI.\CEAE 150 



^tigmas or styles distinct or united, 

 neither cleft nor foUaceous. 

 Style wanting; dwarf water plants. 



83. EUTI.VACEAE 156 



Styles present; not water herbs. 

 Stamens 2, rarely 3. 



101. Oleaceae 179 



Stamens more than 3. 



Leaves pimctate with trans- 

 lucent dots. 



72. Rutaceae 150 



Leaves without translucent dots. 



Calyx irregular, one of the 



sepals spurred or saccate; 



anthers united around the 



stigma. 



69. Baf.samixaceae 149 

 Calyx regular; none of the 



sepals saccate; anthers 

 distinct. 

 Sfrjle basal, arising between 

 the nearly distinct lobes 

 of the ovary; leaves odd- 

 pinnate. 



70. LIMNAXTHACEAE 150 



Styles not basal; leaves in 

 ours abruptly pinnate, or 

 digitate. 



71. Zygophyllaceae 150 



** Stamens Inserted on the margin of a disk or hTpanthium (perigy- 

 nous or hypogynous). 



Styles and upper part of the ovaries distinct. 



„ , 57. SAXIFRAGACE-VE 110 



Styles united. 



Stamens as many as the petals and opposite them. 



Fruit a samara. 78. AceraCEAE 153 



Fruit a berry, drupe, or capsule. 



Sepals manifest; petals involute; fruit capsular or dru- 

 paceous; ours shrubs or trees. 



79. Rhamnaceae 153 



Sepals minute or obsolete; petals valvate; fruit a berry; 



ours vines with tendrils. 80. Vitaceae 154 



