Seeds without albumen. =216. Acanthaceae.= 634. (626.) Stamens 5. 635 Stamens 8-30. 639 635. Style (or styles) stigmatose beneath the thickened and sometimes 2-lobed apex. Corolla with contorted aestivation. =200. Apocynaceae.= Style (or styles) stigmatose at the apex or between the apical lobes. 636 636. Leaves opposite or whorled, stipulate or connected by transverse lines or ridges. Shrubs or trees. =198. Loganiaceae.= Leaves alternate. 637 637. Ovules erect. Corolla lobed or nearly entire, usually folded in bud. =202. Convolvulaceae.= Ovules pendulous. Styles or stigmas 2. Corolla lobed, but imbricate in bud, or deeply divided. Shrubs or trees. 638 638. Leaves stipulate. Flowers in axillary cymes or panicles. Fruit a drupe. _Dichapetalum_, =121. Dichapetalaceae=. Leaves exstipulate. Flowers in terminal spikes or heads. Fruit a capsule. _Lonchostoma_, =100. Bruniaceae=. 639. Stamens 8. Style 1. Flowers hermaphrodite. _Salaxis_, =189. Ericaceae=. Stamens 10-30. Styles 2. Flowers unisexual or polygamous. _Euclea_, =195. Ebenaceae=. 640. (621.) Fertile stamens 1-4. 641 Fertile stamens 5-16. 658 641. Flowers more or less irregular. 642 Flowers regular. 652 642. Leaves opposite or whorled. 643 Leaves alternate, at least the upper ones. 648 643. Leaves provided with stipules or connected at their base by transverse lines or ridges. Shrubs or trees. =198. Loganiaceae.= Leaves rarely with stipules or transverse lines or ridges at their base, and then herbs or undershrubs. 644 644. Seeds with distinctly developed albumen. 645 Seeds with very scanty albumen or without any. 646 645. Seeds with funicles provided with a wart-like outgrowth. Placentas remaining attached to the beaked and recurved valves of the capsule. Disc not distinctly developed. Calyx deeply divided. Corolla-lobes 5, with descending aestivation. Anther-halves not confluent. Stigma lobed. Flowers in spikes. =216. Acanthaceae.= Seeds without an outgrowth from the funicle or without a funicle. Placentas usually separating from the valves of the capsule. Disc more or less distinctly developed. =208. Scrophulariaceae.= 646. Seeds with scanty albumen. Plants with glandular hairs. Stamens 4. =210. Pedaliaceae.= Seeds without albumen. 647 647. Seeds borne on a large hook-like outgrowth of the funicle, rarely on a small cushion-shaped one, and then herbs. Fruit a capsule, the valves bearing the split dissepiment. Ovules usually few. Leaves simple. =216. Acanthaceae.= Seeds not on a hook-like outgrowth of the funicle, more or less distinctly winged or marginate. Fruit a capsule, the valves usually separating from the more or less dilated dissepiment, or a nut or berry. Ovules numerous. Stamens 4. Leaves usually compound. Shrubs or trees. =209. Bignoniaceae.= 648 (642.) Corolla with valvate or folded aestivation. Partition of the ovary usually placed obliquely to the median plane of the flower. =207. Solanaceae.=