Stamens hypogynous, more rarely perigynous, but then ovary long-stalked and leaves stipulate. Seeds with curved embryo. =87. Capparidaceae.= 116. Ovary at first open at the apex. Styles or sessile stigmas 3, free. Stamens 10-30. Perianth 5-6-cleft about halfway down. Seeds exalbuminous; embryo curved. _Ochradenus_, =89. Resedaceae=. Ovary closed. Stamens 4 or more; if 10 or more, then perianth deeply divided. 117 117. Stamens as many as perianth-segments, 4-6, surrounded by a corona. Styles 3, free or united at the base. =161. Passifloraceae.= Stamens more than perianth-segments, 6-40. Shrubs or trees. =159. Flacourtiaceae.= 118. (71.) Ovules solitary in each ovary-cell. 119 Ovules 2 or more in each ovary-cell. 129 119. Ovules erect or ascending. 120 Ovules pendulous or descending. 124 120. Style 1, with 1-3 stigmas. Stamens inserted within the disc or at its edge. Flowers polygamous or unisexual. Seeds albuminous. Leaves pinnate, exstipulate. =134. Sapindaceae.= Styles 2-10, free or united below. Seeds albuminous, rarely exalbuminous, but then leaves stipulate. Leaves undivided or lobed. 121 121. Perianth-segments 3 or 6. Stamens 3. Flowers unisexual or polygamous. Dwarf shrubs. =125. Empetraceae.= Perianth-segments 4-5. Stamens 4 or more. 122 122. Seeds with straight embryo. Fruit drupaceous. Styles 2-4, united below. Stamens 4-5, perigynous. Perianth valvate in bud. Shrubs. Leaves stipulate, alternate. =137. Rhamnaceae.= Seeds with curved embryo and mealy albumen. Fruit dry, rarely baccate. Herbs or undershrubs, rarely shrubs, but then leaves exstipulate. 123 123. Flowers solitary or in cymes. Herbs or undershrubs. =72. Aizoaceae.= Flowers in spikes or racemes. =71. Phytolaccaceae.= 124. Stamens hypogynous. 125 Stamens perigynous. 127 125. Flowers hermaphrodite. Perianth-segments 4. Stamens 2, 4, or 6. Ovary-cells 2. Seeds exalbuminous; embryo curved. Herbs. Leaves exstipulate. _Lepidium_, =88. Cruciferae=. Flowers unisexual, rarely hermaphrodite, but then perianth-segments 5, ovary-cells 5, and leaves stipulate. 126 126. Flowers unisexual. Leaves simple or palmately compound. Ovary usually 3-celled. =122. Euphorbiaceae.= Flowers hermaphrodite, rarely unisexual, but then leaves pinnate and ovary surrounded by large scales. Ovary 5-celled. Leaves compound, stipulate. =113. Zygophyllaceae.= 127. Flowers unisexual or polygamous. Perianth of the male flowers consisting of calyx and corolla, that of the female and hermaphrodite flowers simple, valvate in bud. Stamens 5. Styles 2. Fruit capsular. Embryo straight. Leaves stipulate. _Trichocladus_, =101. Hamamelidaceae=. Flowers hermaphrodite. Perianth simple. Leaves exstipulate. 128 128. Style and stigma simple. Embryo straight. Shrubs. Leaves alternate. =171. Thymelaeaceae.= Styles or stigmas 2-5. Embryo curved. =72. Aizoaceae.= 129. (118.) Flowers unisexual or polygamous. 130 Flowers hermaphrodite. 136