534. Style 1, with a single stigma. Ovules in the whole ovary 4 or more. Leaves exstipulate. 535 Style 1, with 2-5 stigmas, or styles 2-5. Sepals 5. Leaves alternate. 536 535. Leaves opposite, gland-dotted. Sepals 4-5. Filaments free or united into several bundles. =180. Myrtaceae.= Leaves alternate, rarely dotted. Sepals 2-4. Filaments united into a cup at the base. Fruit indehiscent. =176. Lecythidaceae.= 536. Stipules absent. Calyx with open aestivation. Filaments collected in 5 bundles. Ovules in the whole ovary 3, pendulous. Style entire or cleft at the top. Fruit a nut. _Kissenia_, =164. Loasaceae=. Stipules present. Calyx with imbricate aestivation. Ovules ascending. Style more or less deeply divided. Fruit a berry or a drupe. =103. Rosaceae.= 537. (527.) Style 1, undivided, with a single stigma or with 2 or more stigmas contiguous at their base. 538 Styles 2-20, free or united below, the stigmas not contiguous at the base. 546 538. Stamens as many or twice as many as the petals or fewer, 2-16. 539 Stamens more than twice as many as the petals, or stamens and petals very numerous. 543 539. Stamens fewer than the petals, at least apparently (by coalescence), rarely as many as the petals, but then, as usually, herbs with tendrils. Leaves alternate. Flowers unisexual, rarely polygamous, 5-merous. Fruit usually succulent and indehiscent. Seeds exalbuminous. =223. Cucurbitaceae.= Stamens as many or twice as many as the petals. Herbs without tendrils, or woody plants. 540 540. Sepals valvate in bud. Stamens twice as many, rarely as many as the petals; in the latter case leaves with small stipules. Anthers opening by longitudinal slits. Seeds exalbuminous. =182. Oenotheraceae.= Sepals imbricate or open in bud, rarely valvate, but then either stamens as many as the petals, leaves without stipules, and seeds albuminous, or anthers opening by apical pores. 541 541. Leaves opposite or whorled, undivided, exstipulate, usually with several longitudinal nerves. Filaments bent down in bud. Anthers usually opening by apical pores. Stigma 1. Seeds exalbuminous. =181. Melastomataceae.= Leaves alternate. Stamens as many as the petals. Fruit capsular. Seeds albuminous. 542 542. Stem herbaceous or woody at the base. Leaves exstipulate. Flowers or inflorescences in the axils of the leaves or terminal. Ovules numerous in each ovary-cell. =224. Campanulaceae.= Stem woody throughout. Flowers or inflorescences in the axils or on the surface of the leaves. Ovules 6-8 in each ovary-cell. Seeds with an aril. =129. Celastraceae.= 543. Petals numerous. Stigmas 4-20. Seeds albuminous. Herbs or undershrubs. _Mesembryanthemum_, =72. Aizoaceae=. Petals 4-8. Stigma 1, entire or lobed. Seeds exalbuminous. Shrubs or trees. Leaves undivided, exstipulate. 544 544. Sepals 5-8, red, with valvate aestivation. Petals crumpled in the bud. Ovules at first basal, finally parietal. Leaves not dotted. _Punica_, =175. Punicaceae=.