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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 or fusiform follicles, 5-8× as long as thick (or longer), these variously shaped (terete, compressed, or prominently 3-angled)
1 Fresh plants with clear juice; pistil 1; fruit various, but not of paired, linear follicles.
  2 Liana (sometimes a partially scandent shrub) 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 (occasionally forming shrub-like masses); fruit either a capsule (< 3× as long as wide), paired berries, drupeaceous (Petrea in VERBENACEAE), or a schizocarp of samaras (MALPIGHIACEAE).
    3 Flowers lavender; the showy calyx persisting well after petals fall; fruit drupe-like; [ornamental waif, c. and s. FL]
    3 Flowers not lavender, instead white, yellow, orange, or red; the calyx not showy and not persisting after the petals fall; fruit a capsule (Gelsemium), paired berries (Lonicera) or a schizocarp of samaras (MALPIGHIACEAE); [collectively widespread natives and non-natives].
      4 Petals clawed (the bases noticeably thinner than the broadened tips), the corolla not tubular; fruit a schizocarp of samaras; [uncommon non-natives, c. and s. FL; in part, Heteropterys, Hiptage, and Stigmaphyllon]
      4 Petals not clawed, of similar width from base to tip, the corolla tubular; fruit capsules (Gelsemium) or paired berries (Lonicera); [widespread natives and non-natives]
        5 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; fruit paired berries
        5 Flowers bright yellow, radially symmetrical; leaves widest well below the middle, the apex acuminate; fruit a capsule