CHORIPETALAE 45 



504. Stamens as many as and alternating with the petals, 5. Petals small. 



Style 2-cleft. Ovary inferior. Ovules many. Fruit a berry. Leaves 



lobed. Rihes , 96. Saxifragaceae. 



Stamens as many as and opposite the petals or in greater number. Style 

 simple, more rarely divided, but then ovary half-inferior. Leaves 

 undivided or wanting 505 



505. Stamens numerous, not collected in bundles. Ovary inferior. Style 



simple, with several stigmas. Fruit a berry. Succulent, usually 



leafless plants 167. Cactaceae. 



Stamens as many or twice as many as the petals, or collected in several 

 bundles. Ovary half-inferior. Style simple with an entire or sHghtly 

 lobed stigma, or more or less deeply divided into 2 — 6 branches. Leafy 

 plants 506 



506. Petals 5 — 6, lobed or slit, valvate in bud. Stamens twice their number. 



Style simple. Ovules 6. Fruit a berry. Leaves opposite or whorled. 



Ceriops, Yll, Rhizophoraceae. 



Petals 4 — 8, imbricate in bud. Stamens placed singly or in pairs or 



bundles opposite the petals ; if in pairs or bundles, then style divided. 



Fruit a capsule 159. Flacourtiaceae. 



507. (481.) Ovules solitary in each ovary-ceh 508 



Ovules two or more in each ovary-cell 527 



508. Ovules erect or ascending 50g 



Ovules pendulous or descending 513 



509. Stamens 10 or more. Sepals 5. Petals 5. Ovary 4 — lo-celled. Styles 



or style-branches 2 — 10. Shrubs or trees. Leaves stipulate. 



103. Rosaceae. 

 Stamens 2 — 5 510 



510. Flowers 2-merous. Herbs. Leaves opposite, exstipulate. 



Circaea, 182. Oenotheraceae. 

 Flowers 4 — 5-merous 511 



511. Stamens, at least apparently (by coalescence), fewer than the petals, 3. 



Sepals 5. Petals 5. Ovary-cells and stigmas 3. Flowers unisexual. 

 Tendril-bearing herbs. Leaves alternate. 



Cayaponia, 223. Cucurbitaceae. 



Stamens as many as the petals, 4 — 5. Shrubs or trees, rarely under- 



shrubs. 512 



512. Stamens alternating with the petals. Caly.x with imbricate or open 



aestivation 129. Celastraceae. 



Stamens opposite the petals. Calyx with valvate aestivation. 



137. Rhamnaceae. 



513. (508.) Ovary 2-celled 514 



Ovary 3 — 15-celled 522 



514. Style I, with a single stigma. Flowers 4-merous 515 



Style I, with 2 — 3 stigmas, or stjdes 2 5^7 



