14 APETALAE 



Perianth-segments 3 — 8. imbricate or open in bud. 159. Flacourtiaceae. 



142. (136.) Styles or sessile stigmas 2 — 5. Seeds albuminous ; embryo curved. 



72. Aizoaceae. 

 Style I or a sessile stigma. Seeds exalbuminous or with a straight em- 

 bryo 143 



143. Stigmas or stigma-lobes i — 2. Ovules numerous in each ovary-cell. 144 

 Stigmas or stigma-lobes 4. Ovules 2 — 4 in each ovary-cell. Flowers 



4-merous. Leaves opposite, stipulate I45 



144. Stamens i — 16. Ovary sessile or short-stalked. Embryo straight. 



Leaves without stipules 173. Lythraceae. 



Stamens very numerous. Ovary long-stalked. Embryo curved. Leaves 

 alternate, with small stipules. . Maerua, 87. Capparidaceae. 



145. Perianth with valvate aestivation. Stamens 4. Ovules ascending, at 



least the lower ones. Seeds exalbuminous. . . 169. Penaeaceae. 



Perianth with imbricate aestivation. Stamens 8. Ovules pendulous. 



Seeds albuminous Geissoloma, 168. Geissolomataceae. 



146. {70.) Ovules solitary in each carpel 147 



Ovules 2 or more in each carpel. 152 



147. Ovules erect, incurved. Perianth regular, 4 — 5-parted. Seeds with a 



curved embryo and mealy albumen. Leaves undivided, without 



stipules 14S 



Ovules pendulous or affixed laterally, rarely erect, but then perianth 

 irregular and strap-shaped or surrounded by an epicalyx. . . 149 

 .148. Flowers in spikes or racemes. Fruit succulent, baccate. 



Phytolacca. 71. Phytolaccaceae. 



Flowers in cymes. Fruit dry 72. Aizoaceae. 



14g. Perianth-segments free or nearly so. Stamens hypogynous. . 150 

 Perianth-segments obviously united, at least in the female flowers. Sta- 

 mens usually perigynous 151 



150. Flowers unisexual. Stamens as many as perianth-segments. Fruits 



fleshy, drupaceous 80. Menispermaceae. 



Flowers hermaphrodite or polygamous. Stamens usually more than 

 perianth-segments. Fruits usually dry. . . 78. Ranunculaceae. 



151. Leaves undivided, exstipulate. Shrubs or trees. Flowers imisexual. 



Stamens 10 or more. Seeds with copious albumen. 



83. Monimiaceae. 

 Leaves more or less deeply divided or compound, stipulate. Seeds with- 

 out albumen 103. Rosaceae. 



152. Perianth of 6 free segments, imbricate in bud. Stamens numerous, 



free. Herbs. Leaves floating, peltate, exstipulate. 



Brasenia, 76. Nymphaeaceae. 



Perianth 4 — 8-lobed, valvate in bud. Stamens 4 or more, united at the 



base. Trees. Leaves stipulate 144. Sterculiaceae. 



153. (69.) Ovary i-celled 154 



Ovary, at least after fertilisation, completely or almost completely 2- or 



more-celled 177 



