231:(A) (orig. 232 )
previous:D
previous:161
Ovary or ovaries superior or nearly so, sometimes surrounded by the receptacle, but not adnate to it.
next:232

231:(B)
Ovary inferior or hemi-inferior.
next:459

232:(A) (orig. 233 )
previous:E
previous:231
Ovary 1, undivided, or lobed.
next:233

232:(B)
Ovaries 2-more, free, or connate at base and/or the apex.
next:424

233:(A) (orig. 234 )
previous:232
Ovary 1-locular, sometimes incompletely more-locular.
next:234

233:(B)
Ovary completely 2-more-locular, or nearly so.
next:337

234:(A) (orig. 235 )
previous:233
Ovule 1.
next:235

234:(B)
Ovules 2 -more.
next:282

235:(A) (orig. 236 )
previous:234
Ovule or its funicle basal or nearly so.
next:236

235:(B)
Ovule or its funicle apical or distinctly parietal.
next:266

236:(A) (orig. 237 )
previous:235
Ovule atropous or nearly so, very rarely (Canacomyrica) with an elongated, recurved micropylar tube resembling a funicle.
next:237

236:(B)
Ovule anatropous or campylotropous.
next:243

237:(A) (orig. 238 )
previous:236
Style 1 or absent. Stigma 1, sometimes penicillate.
next:238

237:(B)
Styles 2-4, free or connate at base. Stamens usually 6-9.
next:239

238:(A) (orig. 239 )
previous:237
Bark inside without silky, tough fibres. Stamens 1-5. Perianth entire, or segments 2-5.
next:240

238:(B)
Bark inside with silky, tough fibres. Stamens 8.

239:(A) (orig. 240 )
previous:237
Stipules usually connate into a sheath (ochrea) Perianth-segments 3-6. Endosperm copious, mealy.

239:(B)
Stipules absent. Perianth absent, but several bracteoles present. Endosperm absent. Flowers in a spike. Style short, stigmas 2, long. Fruit a drupe.

240:(A) (orig. 241 )
previous:238
Stipules absent. Flowers in spikes, or in racemes, or in fascicles, involucre absent. Stigma sessile, cushion-shaped or 2-5-lobed. Testa absent. Woody plants. Endosperm copious.
next:241

240:(B)
Stipules present, rarely absent, then either flowers solitary or in involucrate glomerules. Stigma linear or penicillate. Testa present. Perianth-segments at least in the female flowers completely connate.
next:242

241:(A) (orig. 242 )
previous:240
Perianth divided down to the disk into 3 - 5 segments.

241:(B)
Perianth 4- or 5-lobed, male flowers moreover with 4 or 5 petals. Flowers in racemes. (Gjellerupia)

242:(A) (orig. 243 )
previous:240
Stem usually herbaceous. Latex absent. Stamens incurved in bud. Leaves undivided or lobed.

242:(B)
Stem woody. Latex present, rarely watery. Stamens erect in bud.

243:(A) (orig. 244 )
previous:236
Ovule anatropous. Embryo straight.
next:244

243:(B)
Ovule campylotropous. Embryo curved.
next:256

244:(A) (orig. 245 )
previous:243
Stigmas 2 or 3.
next:245

244:(B)
Stigma 1.
next:248

245:(A) (orig. 246 )
previous:244
Flowers bisexual or polygamous.
next:246

245:(B)
Flowers dioecious. Tepals 1 - 5, imbricate. Stamens 3-5. Fruit a drupe. Endosperm absent. (Pistaciaceae)
Pistaciaceae
246:(A) (orig. 247 )
previous:245
Tepals rarely 2. Stamens 7 or less.
next:247

246:(B)
Tepals 2. Stamens 8-more. (Bocconia)

247:(A) (orig. 248 )
previous:246
Tepals 2-5, imbricate. Stamens hypogynous or perigynous, epitepalous, as many as, rarely more than the tepals. Fruit dry. Endosperm present. Leaves opposite. (incl. Illecebraceae)

247:(B)
Tepals 4-7, valvate. Stamens perigynous, alternitepalous. Fruit a drupe. Endosperm scanty or absent.

248:(A) (orig. 249 )
previous:244
Stamens perigynous on the upper margin of a more or less concave receptacle, or inserted on the perianth.
next:249

248:(B)
Stamens hypogynous or flowers unisexual and stamens on a central column.
next:250

249:(A) (orig. 250 )
previous:248
Stipules absent. Leaves alternate
next:254

249:(B)
Stipules present. Tepals 5 - 10. Stamens 1-4, or numerous. Fruit dry.

250:(A) (orig. 251 )
previous:248
Leaves usually opposite. Anthers introrse or latrorse. Fruit indehiscent. Stamens 5 or more.
next:253

250:(B)
Leaves alternate. Anthers extrorse or latrorse.
next:251

251:(A) (orig. 252 )
previous:250
Young inflorescence resembling a young fir-cone. Filaments epitepalous r, free or slightly adnate to the perianth. Ovule without integuments. Trees, or shrubs, or lianas.

251:(B)
Young inflorescences not as above. Filaments alternitepalous, free or connate. Ovule with 2 integuments.
next:252

252:(A) (orig. 253 )
previous:251
Trees. Filaments completely connate. Fruit fleshy, dehiscent.

252:(B)
Shrubs or lianas. Filaments free or connate at base. Fruit a drupe or a samara. (Petiveriaceae = tribe Rivineae)

253:(A) (orig. 254 )
previous:250
Leaves with translucent dots and/or lines, crystals absent (lens!) Tepals 4 or 6, free, imbricate. Fruit fleshy. Endosperm absent. Stamens many.

253:(B)
Leaves with raphids and/or cystoliths, without translucent dots or lines (lens!) Perianth corolloid, 4- or 5-dentate, plicate or contort. Fruit dry. Endosperm present.

254:(A) (orig. 255 )
previous:249
Plants with peltate scales, at least on undersurface leaves. Stamens alternitepalous, 4 or twice as many as the 4-8 tepals. Stamens inserted on the upper margin of the receptacle. Fruit fleshy.

254:(B)
Plants with simple hairs or glabrous, rarely with medifixed hairs. Stamens epitepalous, 4 or 5, as many as the tepals.
next:255

255:(A) (orig. 256 )
previous:254
Flowers usually elongate (at least so in S.E. Asia) Stamens adnate to the perianth-segments. Ovary usually stipitate (at least so in S.E. Asia) Integuments 2. S. Hemisphere.

255:(B)
Flowers urceolate or shortly-cylindric. Stamens free or slightly adnate to the base of the perianth-segments. Ovary sessile. Integuments absent. S.E. Asia. (Cansjera, Lepionurus)

256:(A) (orig. 257 )
previous:243
Perianth-segments either imbricate, rarely reduced to 1 tepal, or absent in the male flowers, or valvate and then either free, or stamens perigynous.
next:257

256:(B)
Perianth undivided or 3-5-lobed, valvate or plicate, persistent in fruit, usually surrounded by bracts. Stamens hypogynous. Leaves usually opposite. Perianth corolloid. Stigma 1. Plants usually with raphids and/or cystoliths (lens!)

257:(A) (orig. 258 )
previous:256
Stamens as many as the tepals, alternitepalous, or more.
next:258

257:(B)
Stamens as many as the tepals, epitepalous, or less, rarely more, then leaves opposite and flowers in fascicles or in cymes, and stigmas 2-more.
next:263

258:(A) (orig. 259 )
previous:257
Leaves alternate.
next:259

258:(B)
Leaves opposite or in whorls. Flowers solitary, or in glomerules, or in cymose panicles. Stigma simple. Endosperm present. (Adenogramma)

259:(A) (orig. 260 )
previous:258
Endosperm present. Herbs, shrubs, or trees. Stigmas 1-5.
next:260

259:(B)
Endosperm absent. Shrubs, trees, or lianas. Flowers in fascicles or in panicles. Stigma 1.

260:(A) (orig. 261 )
previous:259
Flowers in spikes, or in racemes, or in panicles. Stigmas 1-5.
next:261

260:(B)
Flowers in racemes of fascicles. Style 3-partite. Stipules connate into a sheath (ochrea)

261:(A) (orig. 262 )
previous:260
Leaves simple. Flowers usually actinomorphic. Stamens free or connate at base only.
next:262

261:(B)
Leaves compound. Flowers zygomorphic. Stamens 6, connate into 2 bundles of 3. (Fumariaceae)
Fumariaceae
262:(A) (orig. 263 )
previous:261
Anthers dorsifix. Fruit a drupe or a samara. Flowers bisexual to monoecious. (Petiveriaceae = tribe Rivineae)

262:(B)
Anthers basifix. Fruit a berry. Flowers dioecious. Stigmas 2. (Achatocarpaceae)
Achatocarpaceae
263:(A) (orig. 264 )
previous:257
Stipules absent. Tepals imbricate or valvate, rarely 1, or absent in the male flowers. Stamens as many as the tepals, or less, hypogynous or nearly so, rarely distinct perigynous, then either style simple, at least at base, or leaves alternate.
next:264

263:(B)
Stipules present, rarely absent, then either stamens more than the tepals, or stamens distinct r perigynous and styles 2, free or partly connate, and leaves opposite. (incl. Illecebraceae)

264:(A) (orig. 265 )
previous:263
Bracteoles present. Perianth more or less membranous or papyraceous. Filaments usually connate. Endosperm present. Embryo more or less curved.

264:(B)
Bracteoles absent in bisexual and male flowers, rarely present, then embryo usually spirally curved. Perianth more or less herbaceous or membranous. Filaments free or nearly so. Styles or stigmas or stigmatic r lobes 2-5.
next:265

265:(A) (orig. 266 )
previous:264
Tepals valvate. Leaves alternate. Stipules absent. Tepals spongious in fruit. Stamens hypogynous. Embryo only slightly curved. Australia.

265:(B)
Tepals imbricate.