KEY TO THE FAMILIES 



Fr. of 4-5 dehiscent follicles: lvs. opposite Evodia 



Fr. of green, red and purple drupes: lvs. alternate 94. Anacardiaceae 



26b. Lvs. simple, alternate. 



Plants monoecious: fr. a globose syncarp of 1-seeded nutlets: 



trees with palmately lobed lvs 79. Platanaceae 



Plants dioecious: shrubs or trees with pinnately veined lvs.: 

 fr. a drupe. 



Fls. axillary, solitary, fascicled or in cymes 95. Aquifoliaceae 



Fls. in fascicles on the upper surface of the If. blades. . . Helwingia 



25b. Fls. perfect. 

 27a. Ovary superior, free from the calyx, above or surrounded by, 

 but not united with the receptacle. (27b, p. 15) 

 28a. Plants aquatic, large herbs with peltate or floating lvs.: 



sepals, petals, stamens and carpels several to many. . . 59. Nymphaeaceae 

 28b. Plants terrestrial. 

 29a. Sap of plants acrid, resinous, milky or colored. 



Herbs: sepals 2: fls. large 70. Papaveraceae 



Shrubs or trees: sepals 3-5: fls. small 94. Anacardiaceae 



29b. Sap of plants watery. 

 30a. Fr. a pod (legume), usually dehiscent: fls. mostly irre- 

 gular: lvs. alternate 81. Leguminosae 



30b. Fr. not a legume. 

 31a. Vines, herbaceous or woody. 



32a. Herbaceous vines, sometimes fleshy: lvs. alternate. 

 33a. Vines twining, without tendrils: lvs. simple. 



Fls. regular: lvs. not peltate: sepals 2: fr. 1- 



seeded, indehiscent: plant fleshy 56. Basellaceae 



Fls. very irregular: lvs. peltate: sepals 5: fr. 



of 3 1-seeded carpels 84. Tropaeolaceae 



33b. Vines with tendrils. 



Lvs. biternately compound: sepals 4: fr. a 3- 

 celled membranous inflated capsule with 



several seeds Cardiospermum 



Lvs. simple, palmately lobed or cleft: sepals 5: 

 ovary stipitate: fr. a 1-celled many-seeded 



berry 116. Passifloraceae 



32b. Woody vines. 

 34a. With tendrils: lvs. palmately veined or compound, 



alternate: stamens opposite the valvate petals. "04. Vitaceae 

 34b. Without tendrils: lvs. simple, never palmately 

 veined. 



35a. Fr. a dehiscent capsule 96. Celastraceae 



35b. Fr. indehiscent: lvs. alternate. 



Fr. a fleshy many-seeded berry 2-4 cm. long: 

 stamens many: lvs. large and broad, 



5-12 cm. long 109. Actinidiaceae 



Fr. a drupe: lvs. ovate-lanceolate, 1-5 cm. 

 long. 

 Lvs. prominently pinnately-nerved: calyx 



lobes or sepals valvate Berchemia 



Lvs. not prominently nerved: calyx lobes 



or sepals imbricate Sabia 



31b. Trees, shrubs or herbs, not vines. 

 36a. Sepals 2: herbs. 



11 



