Lianas, suffruticose to slightly herbaceous, lacticiferous. Leaves opposite, non-glandular, pinnately-nerved; petioles somewhat perfoliate, mostly glandular in the axils. Inflorescences ? corymbose, racemose, or umbellate, mostly axillary, rarely subterminal. Flowers mostly medium-sized to large; calyx 5-lobed, the lobes equal to subequal, bearing 1 or rarely several squamellae within; corolla salverform to subinfundibuliform, with or rarely without 5-epistaminal append-ages, the orifice with a thickened annulus, the tube straight or gibbous, the limb 5-lobed, dextrorsely convolute; stamens 5, included or half exserted, the anthers connivent and agglutinated to the stigma, with an enlarged connective; gynoeci-um 2-carpellate, apocarpous, the ovary superior, the ovules many, the nectaries 5, separate or concrescent, thin or fleshy, the style 1, the stigma fusiform or sub-capitate, sometimes weakly umbraculiform below. Fruit ? apocarpous, sometimes connate apically or ? agglutinated, of (1-)2 follicles; seeds many, dry, comose apically.
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