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Shrubs, sometimes subherbaceous, erect or lianoid, lacticiferous. Leaves qua-ternate or opposite, rarely alternate above, non-glandular, pinnately-nerved; petio-late, glandular in the axils. Inflorescences cymose, few-to several-flowered, axil-lary or (falsely ?) terminal. Flowers large and showy; calyx 5-lobed, the lobes + equal, foliaceous, without squamellae within; corolla infundibuliform, without appendages, the limb 5-lobed, sinistrorsely convolute; stamens 5, included, the anthers free and not agglutinated to the stigma, without an enlarged connective; gynoecium 2-carpellate, syncarpous, the ovary superior, the ovules numerous, the nectary annular, the style 1, the stigma umbraculiform below and-bicapitate above. Fruit a capsule, globose or subglobose, spiny; seeds numerous, dry, com-pressed, concentrically winged.
Shrubs erect or trailing. Leaves whorled, with axillary glands. Flowers large, in terminal or seemingly axillary corymbs. Calyx deeply divided, without basal glands. Corolla yellow, funnelform, narrow part with fringed scales, limb campanulate, lobes overlapping to left. Stamens inserted at narrow part of corolla; filaments very short; anthers narrowly oblong, base rounded, coherent with pistil head; disc cup-shaped, obscurely 5-lobed or entire, fleshy, thick. Ovary 1-loculed, with two parietal placentae; ovules numerous. Style filiform; pistil head thick, with a membranous, reflexed rim, apex conical, shortly 2-lobed. Capsules globose, glabrous, sharply spiny, 2-valved. Seeds numerous, imbricate, compressed, winged or with a membranous margin; radicle short.
