Ovary 3-4-celled with numerous ovules in each cell. Styles 3-4. Stamens 3-8. Fruit a capsule or a schizocarp. Leaves undivided, stipulate. _Myrothamnus_, =99. Myrothamnaceae=. 69. (54.) Ovary superior or nearly so. 70 Ovary inferior to half-inferior. 153 70. Ovary 1, entire or lobed. 71 Ovaries 2 or more, distinct or united at the base only. 146 71. Ovary 1-celled, sometimes incompletely chambered. 72 Ovary completely or almost completely 2-or more-celled. 118 72. Ovule 1. 73 Ovules 2 or more. 103 73. Ovule erect or ascending or attached by a basal funicle. 74 Ovule pendulous or descending. 94 74. Ovule straight. 75 Ovule incurved or inverted. 80 75. Style 1 or none; stigma solitary or stigmas 2 or more, contiguous at the base. Stamens 1-12. 76 Styles 2-4, free or united at the base; stigmas not contiguous at the base. Stamens 4-50. 79 76. Flowers hermaphrodite or polygamous. Stigma sessile, 2-lobed. Seed with fleshy albumen. Shrubs or trees. Leaves without stipules. _Exocarpus_, =56. Santalaceae=. Flowers unisexual, rarely polygamous, but then herbs and stigma penicillate. 77 77. Leaves exstipulate. Stamens 2-12. Stigmas 2. Seed without albumen. _Myrica_, =48. Myricaceae=. Leaves stipulate, rarely exstipulate, but then stigma 1. Stamens 1-5. 78 78. Stamens straight in bud. Juice milky. Trees. =53. Moraceae.= Stamens incurved in bud. Juice not milky. =54. Urticaceae.= 79. Leaves simple, entire toothed lobed or cleft, with a stem-clasping sheath at the base. Seed with copious mealy albumen. =66. Polygonaceae.= Leaves compound, exstipulate. Stamens 5. Seed without albumen. _Pistacia_, =127. Anacardiaceae=. 80. (74.) Ovule incurved. Embryo distinctly curved; albumen usually mealy. 81 Ovule inverted. Embryo straight or nearly so; albumen usually fleshy or wanting. 87 81. Perianth-segments 6, petal-like, free. Stamens 8-10. Style 3-4-cleft. Flowers dioecious. Spiny trees. _Didierea_, =134. Sapindaceae=. Perianth-segments 1-5. 82 82. Perianth with valvate and folded aestivation, lobed, enlarged in fruit. Stamens hypogynous, united at the base. =69. Nyctaginaceae.= Perianth with imbricate or open aestivation, rarely with valvate not folded aestivation; in the latter case deeply divided. 83 83. Stamens 1-10, perigynous, rarely (_Queria_) 10, hypogynous. Stipules present, rarely absent, and then leaves opposite and styles 2-3. =75. Caryophyllaceae.= Stamens 1-5, hypogynous or nearly so, rarely distinctly perigynous, but then stipules wanting and leaves alternate or style 1. 84 84. Stamens as many as the perianth-segments or one less (3-5), alternating with them, hypogynous. Flowers hermaphrodite. 85 Stamens as many as the perianth-segments or one less, but opposite to them, or considerably fewer, or in greater number. Leaves without stipules. 86 85. Flowers in cymes, 5-merous. Perianth membranous. Embryo hooked. Leaves whorled, usually stipulate. _Adenogramma_, =72. Aizoaceae=.