XVI 



KEY TO THE FAMILIES 



Small trees. 

 Herbs or vines. 

 Stamens on the calyx. 

 Pistil one. 

 Vines. 

 Trees. 



Stamens not in clusters. 

 Stamens in clusters. 

 Herbs with black-dotted leaves. 

 Herbs with dotless leaves. 

 Ovary 3-celled. 

 Ovary 5-many- celled. 

 Ovary 1-celled, with parietal pla- 

 centae. 



With one parietal placenta. 

 Fruit not pulpy. 

 Fruit pulpy. 



With more than one parietal pla- 

 centa. 



Sepals two or three. 

 Sepals four. 

 Sepals five. 



Ovary 1-celled ; placenta central. 

 Stamens ten or less, or if more, never more 

 than twice as many as the divisions of 

 the corolla. 



Ovary or ovaries not compound. 

 Ovules on a free central placenta. 

 Sepals two. 

 Sepals four or five. 



Stamens not opposite the petals. 

 Stamens opposite the petals. 

 Ovules not on a free central placenta. 

 Trees with angulately lobed leaves. 

 Trees with compound leaves. 

 Herbs. 

 Stamens on the receptacle. 



Anthers not opening by valves. 

 Anthers opening by valves. 

 Stamens on the calyx. 

 Ovaries more than one. 

 Plants fleshy. 

 Plants not fleshy. 

 Ovary one. 



Flowers in globular heads. 

 Flowers not in heads. 

 Ovary compound as shown by the num- 

 ber of cells, placentae or styles. 

 Woody plants. 

 Stamens ten. 

 Stamens four or five, alternate with 



the petals. 

 Leaves simple. 

 Leaves compound. 



Fruit bladdery -inflated. 

 Fruit a small drupe. 

 Stamens four or five, opposite the 

 petals. 



ANONACEAE, 90. 

 RANUNCULACEAE, 90. 

 ROSACEAE, 104. 



MENISPERMACEAE, 95. 



DRUPACEAE, 109. 

 TILIACEAE, 131. 

 HYPERICACEAE, 133. 



EUPHORBIACEAE, 122. 

 MALVACEAE, 131. 



RANUNCULACEAE, 90. 

 BERBERIDACEAE, 94. 



PAPAVERACEAE, 95. 

 CAPPARIDACEAE, 102. 

 CISTACEAE, 134. 

 PORTULACACEAE, 85. 



PORTULACACEAE, 85. 



CARYOPHYLLACEAE, 86. 

 PRIMULACEAE, 146. 



PLATANACEAE, 103. 

 CAESALPINIACEAE, 110. 



RANUNCULACEAE, 90. 

 BERBERIDACEAE, 94. 



CRASSULACEAE, 102. 

 ROSACEAE, 104. 



MIMOSACEAE, 110. 

 CAESALPINIACEAE, 110. 



SlMARUBACEAE, 122. 



CELASTRACEAE, 127. 



STAPHYLEACEAE, 127. 

 ANACARDIACEAE, 126. 



