(Last Modified On 3/15/2013)
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(Last Modified On 3/15/2013)
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Family
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TRIGONIACEAE
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Contributor
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DANIEL F. AUSTIN
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Description
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Trees or scandent shrubs; branchlets terete or angulate. Leaves simple, opposite or alternate, entire; blades pinnately veined; stipules usually present, deciduous, interpetiolar, sometimes connate. Inflorescences thyrsiform, paniculate or racemose. Flowers small, , irregular, bibracteolate; sepals 5, free or connate at base, un- equal, imbricate in bud; petals 3 or 5, white or pink, contorted in bud, hypogynous or subperigynous, alternate with sepals, unequal, posterior often largest and gibbous or spurred at base; stamens 5-12 with 2-6 of the fertile ones united, the tube being cleft opposite the spurred petal, the anthers 2 or 4-celled, opening by longitudinal introrse slits; disc glands present opposite the spurred petal; ovary superior, 3-celled, wooly, the ovules 2-oo in each cell, biseriate, axile, anatropous, the style terminal, simple, the stigma capitate or obliquely truncate. Fruit capsular, 3-celled, septi- cidally 3-valvate, the valves separating from the central column and themselves often separating into epicarp and endocarp; seeds 2-oo in each cell, testa thin, compressed, covered with long wool, endosperm present, the embryo straight, transverse to the length of the seed, cotyledons plane, thin, radicle short.
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Habit
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Trees shrubs
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Distribution
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A tropical family of four genera: Trigonia, Lightia, Trigoniastrum, and Hum- bertodendron. Only Trigonia is found in Panama.
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