Shrubs, deciduous, 1-2 m tall. Young branches with retrorse stiff hairs, becoming glabrous. Petiole very short, to 2 mm, hispid. Leaf blade ovate to lanceolate, 15-70 × 5-20 mm, both surfaces glabrous but long hispid on margin and veins abaxially, base cuneate, margin entire to occasionally serrate or lobed, apex acute. Inflorescence a congested terminal thyrse of cymes (cymes 1-3-flowered); pedicels short or nearly absent. Bracts leaflike, lanceolate to obovate; bracteoles linear to subulate, ca. 4 mm, hispid. Calyx of 5 linear sepals, 4-10 × ca. 1 mm, ciliate with stiff hairs. Corolla white, sometimes tinged red, hypocrateriform, 10-20 mm, nearly twice as long as sepals; lobes 5, spreading, suborbicular; tube densely villous inside, with sparsely adpressed hairs outside. Stamens 4, didynamous, included; filaments short, hispid; anthers oblong. Ovary narrowly ovoid, hirsute; styles filiform, exceeding stamens; stigmas capitate. Achene terete, striate, crowned with 5 slightly enlarged and long ciliate persistent sepals. Fl. May, fr. Jun-Aug.
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