| General Information |
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| Distribution | A genus of 3-4 species of the Neotropics, ranging from Mexico to northern Argentina, Uruguay, and the West Indies.
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Habit
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Lianas, growing closely appressed to supporting structures, climbing by means of recurved tendrils representing modified leaflets.
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Leaves
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Leaves compound, with 2 leaflets and a terminal, 3-parted, claw-like tendril.
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Flowers
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Flowers in contracted, few-flowered to several-flowered, axillary cymes or panicles, sometimes solitary; calyx membranous, often irregularly lobed or split and spathe-like, campanulate; corolla yellow, tubular-campanulate, glabrous externally; nectary disk annular-pulvinate; stamens 4; ovary 4-angled, ovules in 2-4 series per cell.
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Fruit
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Fruit a narrow, linear, compressed capsule, the valves parallel to the septum, smooth externally.
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Seeds
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Seeds with 2 wings, these not sharply demarcated from the seed body.
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