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Knightia comprises three species: one in New Zealand, which is cultivated, and two in New Caledonia. They are trees or shrubs with alternate, petiolate leaves, which are entire or dentate, simple or (rarely) forked. The inflorescences are in small, terminal or axillary groups. The flowers are numerous and in pairs; the floral bracts small or large, membranous or brightly coloured, usually caducous. The flowers are 4-merous; the perianth is cylindrical and the tepals curl spirally; the stamens have short filaments; the style is extended. The fruit is a woody follicle with two valves, and the seeds are winged at the apex (Allan 1961, Virot 1968).