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. _Myriophyllum_, =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.= Leaves undivided, exstipulate. Flowers in spikes, racemes, panicles, or fascicles. Ovary 3-4-celled. Styles 1-4. 525 525. Stamens as many as and opposite the petals, 4-5. Style simple. Flowers in racemes or fascicles. =59. Olacaceae.= Stamens as many as and alternate with the petals or twice as many. 526 526. Stamens as many as the petals, 4-10. Seeds albuminous. =187. Cornaceae.= Stamens twice as many as the petals, 6-8, but the alternate ones sometimes without anthers. Sepals and petals valvate in bud. Styles 3-4. Flowers polygamous. Seeds exalbuminous. Leaves alternate. =177. Rhizophoraceae.= 527. (507.) Ovules 2-4 in each ovary-cell. 528 Ovules more than 4 in each ovary-cell. 537 528. Stamens as many as the petals or fewer. 529 Stamens twice as many as the petals or more. 533 529. Stamens, at least apparently (by coalescence), fewer than the petals, 2-4. Flowers 5-merous, unisexual. Ovary inferior. Usually herbaceous and tendril-bearing plants. Leaves alternate. =223. Cucurbitaceae.= Stamens as many as the petals, 4-5, free or nearly so. Trees or shrubs, rarely undershrubs. 530 530. Stamens opposite the petals. Petals valvate in bud. Ovary inferior. Style simple; stigma entire. Leaves opposite, exstipulate. _Olinia_, =170. Oliniaceae=. Stamens alternating with the petals. Ovary usually half-inferior. Leaves opposite, but stipulate, or alternate. 531 531. Leaves exstipulate, alternate. Flowers hermaphrodite, 5-merous. Ovules pendulous. Seeds with a minute embryo and abundant albumen. =100. Bruniaceae.= Leaves stipulate. 532 532. Calyx large. Petals 5, usually two-cleft. Stigmas 2-3. Ovules pendulous. Fruit indehiscent. Seeds exalbuminous. Leaves alternate. _Dichapetalum_, =121. Dichapetalaceae=. Calyx small. Petals imbricate in bud. Style simple or wanting. Ovules erect, rarely pendulous, but then leaves, at least those of the flowering branches, opposite. =129. Celastraceae.= 533. Stamens twice as many as the petals. Petals with valvate aestivation. Style 1. Seeds albuminous. Leaves opposite or whorled, stipulate. =177. Rhizophoraceae.= Stamens more than twice as many as the petals. Petals with imbricate or contorted aestivation. Seeds exalbuminous. 534