Woody vines with thickened leaves. Inflorescences umbellate. Flotwers large, fragrant, white or yellow; calyx lobes usually ovate; corolla tubular, the tube usually inflated at the base, fleshy, the lobes contorted in bud, rounded-elliptic when expanded; stamens coherent into a column arising from the base of the corolla tube, the corona 5-parted, segments carnose, joined individually to the dorsal sides of the stamens; pollinia small, erect; stigma head usually with a conical appendage, exserted or included. Fruit generally a single follicle, thick, blunt or acuminate; seeds comose.
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