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No key was found for the requested taxon, but it has only one child: Gelsemium. Showing where it is keyed below.

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Key J3: lianas with opposite simple leaves with entire margins {add Paederia in RUBIACEAE}

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1 Fresh plants with white, milky juice; pistils 2, united only by the style and stigma; fruit a pair of linear follicles, > 8× as long as thick
1 Fresh plants with clear juice; pistil 1; fruit either a capsule (< 3× as long as wide), or paired berries, or an accessory fruit of a utricle embedded in a leathery expanded calyx.
..2 Liana climbing by paired, recurved spines at the nodes; fruit an accessory fruit of a utricle embedded in a leathery expanded calyx
..2 Liana climbing by twining; fruit either a capsule (< 3× as long as wide) or paired berries.
....3 Flowers white, pale yellow, orange, or red, distinctly to obscurely bilaterally symmetrical; leaves widest slightly below, at, or above the middle, the apex rounded, obtuse, to broadly acute
....3 Flowers bright yellow, radially symmetrical; leaves widest well below the middle, the apex acuminate
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