48 CHORIPETALAE 



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 I, 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, imdivided, exstipulate, usually with several 



longitudinal nerves. Filaments bent down in bud. Anthers usually 

 opening by apical pores. Stigma i. 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 under- 



shrubs. Mesembryanthemum, 72. Aizoaceae. 



