266:(A) (orig. 267 )
previous:235
Stipules present.
next:267
266:(B)
Stipules absent.
next:271
267:(A) (orig. 268 )
previous:266
Fruit indehiscent. Styles 1 or 2.
next:268
267:(B)
Fruit dehiscent. Leaves simple or lobed. Flowers unisexual, solitary, or in fascicles, or in spikes, or in racemes, or in panicles. Stamens hypogynous. Ovule with a caruncle. Endosperm present. Embryo straight.
268:(A) (orig. 269 )
previous:267
Stigmas 2-4, rarely 1, then flowers unisexual and all or the male flowers in a cymose, usually spike-like or capitate inflorescence or on a broadened common receptacle.
next:269
268:(B)
Stigma 1. Flowers unisexual and solitary or bisexual. Leaves usually compound. Endosperm absent. Embryo straight.
269:(A) (orig. 270 )
previous:268
Flowers unisexual, the male ones in spike-, or in raceme-, or in capitule-like, or in paniculate inflorescences, or on a broadened common receptacle, rarely in cymose inflorescences, then stamens incurved in bud.
next:270
269:(B)
Flowers bisexual or unisexual, then the male ones in lax cymes or in fascicles. Stamens straight in bud. Shrubs or trees. Leaves simple, usually alternate (Lozanella: opposite) Stigmas 2-4.
270:(A) (orig. 271 )
previous:269
Stipules free. Male flowers with 5 tepals and 5 stamens; female flowers with 1 tepal, enveloping the ovary. Filaments straight in bud. Young leaves involute.
270:(B)
Stipules connate, leaving an amplexicaul scar, if free leaves folded and filaments bent in bud. Flowers usually with 4 perianth-segments; stamens usually 4.
271:(A) (orig. 272 )
previous:266
Perianth present in all flowers.
next:272
271:(B)
Perianth absent in male flowers, connate in the female ones. Flowers in spikes.
272:(A) (orig. 273 )
previous:271
Perianth-segments 6-many. Stamens (5-)10-20(-27)
next:273
272:(B)
Perianth-segments 2-6.
next:274
273:(A) (orig. 274 )
previous:272
Submerged, rootless, aquatic herbs. Leaves in whorls, dichotomously divided.
273:(B)
Shrubs or treelets. Leaves opposite, undivided.
274:(A) (orig. 275 )
previous:272
Perianth-segments valvate.
next:275
274:(B)
Perianth-segments imbricate. Embryo straight.
next:279
275:(A) (orig. 276 )
previous:274
Woody plants, rarely perennials. Leaves not with a dichotomous, open venation. Stamens 4-9, at least some epitepalous.
next:276
275:(B)
Annuals. Leaves with a dichotomous, open venation. Stamens 2, rarely 1 or 3. Tepals 2 (or 3), membranous. Stamens alternitepalous. Himalayas to N.W. China. (Circaesteraceae)
276:(A) (orig. 277 )
previous:275
Stamens 4 or 5.
next:277
276:(B)
Stamens 6-9. Leaves opposite, tomentose below. Perianth segments 3 or 4, enlarging in fruit. Anthers with longitudinal slits. Style linear. Endosperm absent. (Barbeyaceae)
Barbeyaceae
277:(A) (orig. 278 )
previous:276
At least the male flowers with 4 or 5 perianth-segments. Stamens 4 or 5, hypogynous. Style absent or nearly so. Endosperm usually well developed.
next:278
277:(B)
Perianth-segments and stamens 4, usually inserted on the perianth. Style 1. Endosperm absent. Stamens free. Anthers introrse with longitudinal slits. Stigma 1. Placenta not or slightly protruding. Testa present.
278:(A) (orig. 279 )
previous:277
Perianth-segments 4 or 5. Anthers with longitudinal slits. Stigma 1. Testa absent. Placentas strongly protruding.
278:(B)
Male flowers with 4 or 5 perianth-segments and often with as many petals, female flowers with 1 or 2 perianth-segments. Anthers with transversal slits. Stigmas 3. Testa present. Filaments connate. Anthers extrorse. Embryo and seed curved.
279:(A) (orig. 280 )
previous:274
Bark without tough silky fibres.
next:280
279:(B)
Bark inside with tough, silky fibres. Flowers usually 4- or 5-merous. Perianth-tube cylindric or bowl-shaped. Anthers with longitudinal slits. Embryo straight.
280:(A) (orig. 281 )
previous:279
Stamens perigynous. Style present.
next:281
280:(B)
Stamens hypogynous. Stigma sessile. Leaves opposite. Stamens numerous. Embryo straight.
281:(A) (orig. 282 )
previous:280
Leaves usually gland-dotted. Flowers usually 3-merous. Anthers with valves. Embryo straight. Woody plants, rarely parasitic twiners (Cassytha) Perianth-tube disk- to bowl-shaped. Stamens 8- many.
281:(B)
Leaves not gland-dotted. Flowers 4- to 5- meroeus. Anthers with intrors, longitudinal slits. Embryo curved. Plant usually herbaceous. Perianth-tube globular to tubular. Stamens 8-10. (Galenia)