^6 CHORI PETAL AE 



■515. Stamens numerous. Flowers hermaphrodite, in cymes. Fruit a berry. 

 Seeds exalbuminous. Trees or shrubs. Leaves opposite. 



Pitnenta, 180. Myrtaceae. 

 Stamens 4 516 



516. Flowers unisexual, in cymes. Fruit a drupe. Seeds albuminous. Trees 



or shrubs. Leaves opposite Cornus, 187. Cornaceae. 



Flowers hermaphrodite, solitary. Fruit a nut. Seeds exalbuminous. 

 Herbs. Leaves radical Trapa, 182. Oenotheraceae. 



517. Stamens numerous. Petals 5. Stigmas 3. Seeds exalbuminous. Leaves 



alternate Kissenia, 164. Loasaceae. 



Stamens as many as the petals. Stigmas 2. Seeds albuminous. 518 



•518. Fruit a capsule, rarely a nut, and then ovary half-inferior. Trees, shrubs, 



or undershrubs. Leaves simple, undivided. Flowers in heads or 



head-like spikes, rarely in racemes or panicles. 519 



Fruit a schizocarp (splitting into 2 nutlets), a nut, or a drupe. Ovary 

 inferior, rarely half-inferior, but then leaves compound or divided. 

 Flowers in umbels, more rarely in heads, whorls, spikes, racemes, or 



panicles 520 



^19. Leaves stipulate. Flowers usually 4-merous. Styles 2, free. Fruit a 

 capsule. Albumen scanty. 101. Hamamelidaceae. 



Leaves exstipulate, rarely stipulate, but then style i. Flowers 5-nierous. 

 Petals clawed, imbricate in bud. Anthers opening by longitudinal 

 slits. Albumen abundant 100. Bruniaceae. 



520. Fruit a schizocarp splitting into two nutlets, rarely a nut, and then, as 



usually, stem herbaceous or woody at the base only. Flowers 5-merous. 



Epigynous disc usually 2-parted. Styles free. 186. Umbelliferae. 



Fruit a drupe or a nut. Stem woody throughout. Epigynous disc 



usually entire 521 



521. Leaves compound or more or less deeply divided. Flowers in umbels, 



spikes, or racemes. Ovules with ventral raphe. . 185. Araliaceae. 



Leaves simple, undivided, exstipulate. Flowers in racemes or panicles. 



Ovules with dorsal raphe. Fruit a drupe. . . 187. Cornaceae. 



522. (513.) Stem herbaceous. Fruit dry 523 



Stem woody. Fruit more or less succulent 524 



523. Flowers 4-merous. Stamens 2 — 8. Fruit indehiscent or splitting into 



2 — 4 nutlets. Seeds albuminous. Leaves exstipulate. Water-plants. 



Myriophylhim, 183. Halorrhagaceae. 



Flowers 5-merous. Stamens 10. Fruit capsular. Seeds exalbuminous. 



Leaves stipulate. Land-plants 103. Rosaceae. 



524. Leaves compound or more or less deeply divided, rarely the upper ones 



undivided, and then ovary-cells and styles 5. Flowers in umbels or 

 heads, rarely in spikes or racemes. Stamens as many as petals, 4 — 16, 

 rarely twice their number, 10 185. Araliaceae. 



