Shrubs or small trees 2-6 m tall, glabrescent. Petiole slender, 3-12 cm; leaf blade ovate, 5-25 cm, leathery, base obtuse to cordate, entire, apex obtuse or acute, glaucous, subleathery. Inflorescences many-flowered, lax panicles. Pedicel 3-12 mm. Calyx tubular, 1-1.5 cm; lobes deltate, acute, equal. Corolla yellow to red, tubular, 2.5-4.5 cm; lobes short. Stamens subequal, included. Capsules ellipsoid, 0.7-1.5 cm. Seeds brown, ca. 0.5 mm.
Hairless, ± succulent, short-lived shrub or small tree, to 6 m. Young growth blue-green, sometimes with a waxy bloom. Leaves broadly lanceolate to elliptic or spathulate, thickly-textured, glaucous or green; petiole not winged. Flowers erect or pendent, in loose panicle-like inflorescences. Corolla 3-4 cm long, green, becoming yellow or orange, tube narrow, with a slight swelling near the apex and constricted slightly above and below the swelling. Fruit oblong-ellipsoid, 8-12 mm long, hairless, splitting above into 4 valves.