Leaves exstipulate. Fruit usually drupaceous. =127. Anacardiaceae.= 294. (288.) Flowers distinctly irregular. 295 Flowers regular or nearly so. 298 295. Leaves compound. Receptacle expanded into a disc or elongated into a stalk. Filaments free. Trees or shrubs. =127. Anacardiaceae.= Leaves simple, undivided. Receptacle small. 296 296. Stamens 10. Shrubs or undershrubs. =119. Malpighiaceae.= Stamens 5-8. 297 297. Filaments free. Anthers opening by two longitudinal slits. Petals 5, perigynous. Style 1; stigmas 3. Climbing herbs. _Tropaeolum_, =109. Tropaeolaceae=. Filaments united. Anthers opening by an apical pore. Petals hypogynous. =120. Polygalaceae.= 298. (294.) Stamens as many as the petals or fewer or more numerous, but less than twice as many, 2-6. 299 Stamens twice as many as the petals or in greater number, rarely (_Thymelaeaceae_) as many as the petals, but then 8-10. 305 299. Filaments all united below. Fertile and sterile stamens together as many as the petals, 4-6. Disc not distinctly developed. Leaves undivided. 300 Filaments free or united in pairs. 301 300. Stamens all fertile. Seeds albuminous. =110. Linaceae.= Stamens partly sterile (2 fertile, 3 sterile). Seeds exalbuminous. _Cottsia_, =119. Malpighiaceae=. 301. Anthers opening by apical pores. Petals and stamens 5, slightly perigynous. Ovary 3-celled. Style simple; stigma 3-lobed. Seeds with abundant albumen. Undershrubs. Leaves rolled inwards when young, undivided, bearing glandular hairs. _Roridula_, =147. Ochnaceae=. Anthers opening by longitudinal slits. Seeds with scanty albumen or without any. 302 302. Stamens 6, rarely 2 or 4. Style 1. Sepals 4. Petals 4. Embryo curved. Herbs or undershrubs, rarely shrubs. Leaves simple. =88. Cruciferae.= Stamens 5, rarely 4, but then styles 4 and leaves pinnate. Shrubs or trees. 303 303. Flowers 4-merous. Disc within the stamens. Leaves pinnate. =116. Simarubaceae.= Flowers 5-merous. 304 304. Disc within the stamens. Ovary 3-or 5-celled. Styles or sessile stigmas 3 or 5. Leaves simple. =127. Anacardiaceae.= Disc outside the stamens. Ovary 2-celled. Style simple. Leaves pinnate. _Filicium_, =134. Sapindaceae=. 305. (298.) Filaments free. Shrubs or trees, rarely undershrubs. 306 Filaments united into a tube, at least at the base. 312 306. Disc present, more or less ring-, cushion-, or cup-shaped. 307 Disc wanting. Leaves undivided. 310 307. Flowers polygamous, 4-5-merous. Leaves compound, exstipulate. =127. Anacardiaceae.= Flowers hermaphrodite, rarely polygamous, but then 3-merous. 308 308. Leaves with glandular dots, compound, exstipulate. Ovary 3-5-celled. Style simple. =115. Rutaceae.= Leaves without dots. 309 309. Leaves stipulate, pinnate with 1-2 pairs of leaflets, more rarely simple and undivided, and then stigma 3-parted. Ovary 3-5-celled. Style simple. =113. Zygophyllaceae.= Leaves rarely stipulate, but then undivided and stigma entire or 2-lobed. =116. Simarubaceae.=