Twiners, herbaceous. Leaves simple, petiolate, cordate, herbaceous, margin entire (lobed in 1 species), venation pedate; veins raised abaxially, often winged. Inflorescences solitary or paired, axillary, bracteate racemes or panicles; bracteoles usually minute scales (sepal-like in D. duclouxii), basal to calyx. Pedicel filiform. Flowers often fragrant. Sepals free and quincuncial or short connate basally and valvate distally, equally enlarged or outer 3 larger, reflexed or clasping, with (5 or) 7 or 9 (or 11) longitudinal veins basally. Corolla funnelform or nearly salverform, entire to 5-lobed, glabrous except for an apical tuft of hairs. Stamens included; filaments glabrous or basally pilose; anthers linear to sagittate; pollen 3-colpate, not spiny. Disc ringlike, 5-lobed, or absent. Pistil included; ovary unilocular; ovules 2. Style often jointed proximally; stigma ellipsoid, entire or slightly 2lobed. Fruit papery, indehiscent. Seed 1, often longitudinally keeled, smooth, glabrous.
Home