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(Last Modified On 3/14/2013)
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(Last Modified On 3/14/2013)
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Genus
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Bixa L.
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PlaceOfPublication
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Sp. P1. 512, 1753
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Habit
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shrub, tree
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Description
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Shrubs or small trees, with reddish-orange sap. Leaves alternate,
long-petio- late, stipulate, the blade simple, palminerved.
Inflorescences terminal, paniculate. Flowers X, actinomorphic; pedicel
bearing 5 conspicuous glands below the calyx; sepals 5, distinct,
imbricate, fugacious; petals 5, distinct, imbricate, white or pink,
fugacious; stamens oc, distinct, inserted on a thick receptacle, the
anthers 2-thecate, hippocrepiform, apically dehiscent by 2 narrow slits;
pollen 3-colporate, the sexine reticulate or striate-reticulate;
gynoecium with 2 syncarpous carpels, the ovary superior, 1-locular, with
2 parietal placentae, the ovules cc, anatropous, the style simple, the
stigma shortly 2-lobulate. Fruits capsular, loculicidally 2-valvate, the
pericarp densely covered with flexible spines to nearly unarmed; seeds
numerous, with fleshy, reddish testa, the endosperm copious, the embryo
straight.
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Distribution
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A small genus with only one species in Panama and Central America.
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