Calycine colleters absent; corolla salveriform; corolla-lobe aestivation usually sinistrorse (dextrorse in Kopsia, Neisosperma, and Ochrosia); corona absent; style head usually with stigmatic region beneath basal collar; disc normally present; ovary apocarpous (in some Rauvolfia spp.
Leaves opposite; calycine colleters present or absent; corolla salveriform; corolline corona absent; corolla-lobe aestivation almost always sinistrorse; apical connective appendages of anthers often scarcely developed; style head usually with stigmatic region beneath basal collar, sometimes body uniformly receptive; ovary congenitally syncarpous; disc mostly adnate or indistinct from ovary.
Calycine colleters mostly present, often multiseriate; corolla salveriform or rarely funnelform; corolla lobes often in-flexed in bud; aestivation almost always sinistrorse; corona mostly absent; anthers with lignified guide rails; style head with stigmatic region beneath basal collar or flange and usually with (often 5-ribbed) upper wreath or style head subglobose and without basal collar and upper wreath and body uniformly receptive; ovary apocarpous or syncarpous; disc adnate, indistinct, or free.
Galycine colleters usually absent; corolla salveriform; corolla-lobe aestivation sinistrorse; small corolline corona often present in petal sinuses (well developed and often annular in Melodinus); anther connective with a apical extension in Diplorhynchus and Dyera and with both apical connective extension and small sterile basal lobes in Pycnobotrya; style head mostly without basal collar or upper wreath; disc usually absent; ovary apocarpous or syncarpous, sometimes only at base (Diplorhynchus), more than half inferior in Dyera.
Calycine colleters mostly present, often multiseriate, rarely absent; corolla salveriform; corolla-lobe aestivation sinistrorse; corona absent; style head uniformly receptive, ovoid to narrowly clavate, with neither basal collar nor upper wreath but often with slender, elongate nonreceptive apices; ovary apocarpous, 2-5-carpellate; disc adnate or indistinct.
