586. Anthers opening by a transverse slit. Stamens 2. Style wanting. Sepals 2 or 5. Corolla distinctly 2-lipped. Leaves alternate or all radical. Herbs. =214. Lentibulariaceae.= Anthers opening by two longitudinal slits. Style present. Ovules 4. Leaves opposite or whorled. =205. Verbenaceae.= 587. (578.) Ovules attached to a single placenta. Style simple. Stamens as many as or more than the divisions of the corolla. Leaves alternate, compound or reduced to the dilated petiole. =105. Leguminosae.= Ovules attached to two or more placentas. 588. 588. Style simple or 2-cleft. 589 Style 3-10-cleft. Flowers unisexual or polygamous. 603 589. Fertile stamens fewer than the divisions of the corolla, 1-4. 590 Fertile stamens as many as or more than the divisions of the corolla. 595 590. Fertile stamen 1, staminodes 3. Corolla-lobes 4. Stigma 2-cleft. Herbs. Leaves opposite, undivided. =199. Gentianaceae.= Fertile stamens 2 or 4. 591 591. Fertile stamens 2. Herbs or undershrubs. Leaves undivided. Flowers irregular. 592 Fertile stamens 4. 594 592. Seeds 4, with thin albumen. Fruit a capsule with a drupaceous rind Ovules 4-16. Stigma 2-parted. Staminodes 3. _Martynia_, =211. Martyniaceae=. Seeds numerous, without albumen. Ovules numerous. 593 593. Disc wanting. Ovary and fruit ovate. Placentas little projecting. Staminodes none. Small water-plants. Leaves opposite. _Dintera_, =208. Scrophulariaceae=. Disc rarely wanting, and then ovary and fruit linear or oblong and placentas much projecting. =213. Gesneraceae.= 594. Placentas 2. Fruit a berry or nut. Seeds exalbuminous. Shrubs or trees. Leaves compound. =209. Bignoniaceae.= Placentas 4. Fruit a capsule. Seeds albuminous. Herbs without green colour. Leaves scale-like. Flowers irregular. =212. Orobanchaceae.= 595. (589.) Stamens as many as the divisions of the corolla, 3-8. 596 Stamens more numerous than the divisions of the corolla, 7 or more. Shrubs or trees. 600 596. Style stigmatose beneath the thickened, often 2-lobed apex. Placentas 2. Corolla with contorted aestivation. Flowers regular or nearly so, 5-, rarely 4-merous. Juice milky. =200. Apocynaceae.= Style stigmatose at the apex or between the apical lobes. Juice not milky. 597 597. Leaves and stem without green colour; stem herbaceous, leaves scale-like. Flowers irregular. Stamens 4. Placentas 4. =212. Orobanchaceae.= Leaves green, rarely (_Gentianaceae_) without green colour, but then flowers regular, stamens 5 and placentas 2. 598 598. Leaves alternate, without stipules. Stem woody. Bark resinous. Flowers regular, 5-merous. Stigma 1. _Pittosporum_, =97. Pittosporaceae=. Leaves opposite or whorled, rarely alternate or all radical, but then stem herbaceous. 599 599. Stem woody. Leaves opposite or whorled, usually stipulate. Flowers 4-merous. =198. Loganiaceae.= Stem herbaceous or woody at the base only, rarely throughout, but then flowers 5-merous. Leaves exstipulate. =199. Gentianaceae.=