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Columnar trees (sometimes multi-stemmed), bark dark grey to black, rough and friable, checkered fissuring. Roots thick knee-like pneumatophores_Goaqiao, south-western China.
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Flower to mature propagule stage : Calyx reddish with 12 to 14 lobes, petals to 15 mm long, 2-lobed, stamens enclosed in pairs by the petals. Hypocotyl emergent from calyx during maturation, hypocotyl cigar-shaped, terete, elongate, green, to 11-25 cm L. and 1-2 cm W.
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Flowers and leaves : Leaves opposite, simple, elliptic-oblong, glossy green (11-21 L, 4-9 cm W), margin entire, apex pointed, base cuneate. Infloresence axillary, 1-flowered.
