44 CHORIPETALAE 



Flowers 5-merous, Style i, entire or cleft. Seeds exalbuminous. 



223. Cucurbitaceae. 



493. Sepals 2. Fruit opening by a lid. Herbs. Leaves alternate, undivided. 



Portulaca, 73. Portulacaceae. 



Sepals 4—8, sometimes united into an entire calyx. Style simple. 



Fruit indehiscent. Trees or shrubs, rarely [Bruniaceae) undershrubs. 494 



494. Stamens numerous. Petals 5. Ovules 2. Fruit a drupe. Leaves 



alternate, stipulate 103. Rosaceae. 



Stamens as many or twice as many as the petals, 4 — 16. Leaves un- 

 divided 495 



495. Stamens twice as many as the petals, 8 — 16. Leaves opposite or 



whorled 496 



Stamens as many as the petals, 4 — 6. Seeds albuminous. . . . 497 



496. Leaves stipulate. Petals 5 — 8, toothed or lobed, valvate in bud. Anthers 



without appendages. Seeds albuminous. 



Carallia, 177. Rhizophoraceae. 



Leaves exstipulate. Petals usually 4. Anthers with appendages. Seeds 



exalbuminous 181. Melastomataceae. 



497. Stamens opposite the petals. Petals valvate in bud. Ovules pendulous. 



Fruit a drupe. Leaves alternate 59. Olacaceae. 



Stamens alternating with the petals. Petals imbricate in bud. . . 498 



498. Stigma I. Ovules erect. Fruit a drupe. Leaves opposite, stipulate. 



Pleurostylia, 129. Celastraceae. 

 Stigmas 2. Ovules pendulous. Fruit a capsule or a nut. Leaves alter- 

 nate, exstipulate 100. Bruniaceae. 



499. (490.) Ovules apical 500 



Ovules parietal 502 



500. Ovules numerous, affixed to 2 — 3 placentas suspended from the apex of 



the ovary-cell. Styles 2 — 3, free. Stamens 5. Flowers hermaphrodite. 

 Fruit capsular. Seeds with abundant albumen. Herbs. Leaves 



opposite, undivided Vahlia, 96. Saxifragaceae. 



Ovules 2 — 6, suspended from the apex of the ovary-cell. Style i, entire 

 or cleft. Seeds without albumen 501 



501. Stamens 2 — 5. Flowers unisexual. Herbs, undershrubs, or shrubs, 



usually chmbing or prostrate 223. Cucurbitaceae. 



Stamens 8 or more, rarely 4 — 6, but then flowers hermaphrodite. Style 

 simple. Trees, shrubs, or undershrubs. Leaves undivided. 



179. Combretaceae. 



502. Flowers unisexual, rarely polygamous. Herbs or undershrubs, rarely 



shrubs. 503 



Flowers hermaphrodite. Shrubs or trees. Seeds albuminous. . . 504 



503. Flowers 5-merous. Stamens 2 — 5. Seeds exalbuminous. Leaves well- 



developed 223. Cucurbitaceae. 



Flowers 6-merous. Stamens 12 or more. Seeds albuminous. Leaves 

 scale-like Pilostyles, 64. Rafflesiaceae. 



