Shrubs or small trees, 2–3 m tall; old branches glabrous; branches stout, brownish; young shoots slightly pubescent. Petiole terete, 30–40 mm, glabrous; leaf blade leathery, ovate or broadly elliptic, 9–12 × 5–7 cm; base rounded, asymmetrical; apex obtuse or rounded, apiculate; both surfaces glabrous; abaxial surface slightly colored; adaxial surface deep green; midrib raised abaxially, shallowly impressed adaxially; lateral veins 13–17-paired, inconspicuous on both surfaces. Inflorescence racemose-umbellate, 9–13-flowered; rachis 10–15 mm, sparsely pubescent and with long glandular hairs. Pedicel stout, 2.5–4 cm, sparsely shortly glandular-hairy; calyx lobes 5, 5–10 mm, unequal, elliptic-lanceolate, abaxially densely glandular at base, sparsely so in the upper part, margin glandular; corolla campanulate, reddish, 4–4.5 cm, lobes 5, suborbicular, 1–1.5 cm, apex emarginate; stamens 10, unequal, 1.5–2.5 cm, filaments pubescent at base; anthers larger, purplish red, to 3 mm; ovary ovate, ca. 5 mm, densely shortly glandular-hairy; style ca. 3 cm, glabrous; stigma expanded. Capsule not seen. Fl. May.
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