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Key to Combretaceae

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1 Leaves opposite and decussate; flowers in spikes or racemes; leaf domatia (if present) in abaxial leaf vein axils.
  2 Mangrove, a tree or erect shrub, often with pneumatophores; petiole with 2 glands near blade junction; petals ca. 1 mm long, greenish white; leaf blades with glands in sunken pits, several mm in from the leaf margin; flowers with shallowly cupulate hypanthium, inconspicuous
  2 Liana or scandent shrub, lacking pneumatophores; petiole not glandular; petals 10-20 mm long, white, pink, or red; leaf blades not glandular; flowers with tubular hypanthium, showy
1 Leaves alternate; flowers either in heads (arrayed in axillary or terminal panicles or racemes) or in spikes; leaf domatia (if present) on leaf apex or leaf margins or abaxial leaf veins (Conocarpus).
    3 Trees or shrubs, lacking pneumatophores; flowers aggregated into cone-like heads, these in axillary or terminal panicles or racemes
    3 Trees or shrubs, either with or without pneumatophores; flowers in axillary spikes.
      4 Mangroves, often with pneumatophores; petals present, white
      4 Non-mangroves; petals absent