14. KEY TO THE FAMILIES. 



Perianth segments free or nearly so. Stamens hypogynous. 



96. 



96. Flowers unisexual. Fruits fleshy. 49 MENISPERMACEAE. 

 Flowers hermaphrodite or polygamous. Fruits dry. 



48 RANUNCULACEAE. 



97. (42) Shrubs parasitic on stems of trees and shrubs. 



37 LORANTHACEAE. 

 Non parasitic or parasitic only on roots. 98. 



98. Ovary 1 celled. 99. 



Ovary 2 or more celled. 106. 



99. Ovule 1. 100. 

 Ovules 2 or more. 104. 



100. Ovules erect, ascending, attached by an erect funicle or 



adnate to the ovary wall. 101. 



Ovule pendulous or descending. IO2 



101. Ovule straight. Flowers unisexual. Stamens 1 — 5 opposite 



perianth segments. 33 URTICACEAE. 



Ovule inverted. Flowers usually in heads. Stamens alter- 

 nating with perianth segments. 148 COMPOSITAE. 



102. Flowers unisexual. 32 MORACEAE. 

 Flowers hermaphrodite. 103. 



103. Stamens 2. Leaves large radical. (Gunnera). 



114 HALORRHAGACEAE. 

 Stamens 3—5. Leaves alternate. 43 AIZOACEAE. 



104. (99) Stamens 8 or 10. 110 COMBRETACEAE 

 Stamens 3—6. 105. 



105. Styles 4. Ovules 4. Stamens 4. Petals in male flowers. 



(Laurembergia). 114 HALORRHAGACEAE. 



Style simple or wanting. 35 SANTALACEAE. 



106. (98) Ovule 1 in each ovary cell. 107 

 Ovules 2 or more in each ovary cell. 110. 



107. Ovules erect or ascending. 108. 

 Ovules pendulous or descending. 109. 



108. Leaves opposite or whorled. 142 RUBIACEAE. 

 Leaves alternate. 92 RHAMNACEAE. 



109. Flowers in umbels or heads. 116 UMBELLIFERAE. 

 Flowers solitary or in axillary fascicles or spikes. Water 



plant. (Myriophyllum). 114 HALORRHAGACEAE. 



110. Flowers unisexual styles 2 — 6. (Begonia). 



103 BEGONIACEAE. 

 Flowers hermaphrodite. Style 1. (Ludwigia). 



113 OENOTHERACEAE. 



111. Ovary superior or nearly so. II2. 

 Ovary inferior or half inferior. 24O. 



112. Sepals 4, petals 4. Stamens 6 (4 longer, 2 shorter). Ovary 



1 — 2 celled, or transversely septate. Herbs or under- 

 shrubs. 54 CRUCIFERAE. 



