Shrubs 2–3 m tall; old branches grayish white, bark flaking; young shoots greenish. Petiole terete, furrowed above, 15–20 mm, sparsely long-glandular-hairy; leaf blade leathery, suborbicular or ovate-elliptic to oblong-elliptic, 4–8.5 × 2.5–4 cm; base subcordate or subrounded; margin slightly reflexed; apex rounded, apiculate; abaxial surface greenish; adaxial surface green, slightly shiny; midrib prominently raised abaxially, impressed adaxially; lateral veins 9–14-paired, inconspicuous on both surfaces. Inflorescence terminal, umbellate, 6-or 7-flowered, rachis short, conical, ca. 7 mm, glabrous. Pedicel slender, 1.5–2.5 cm, sparsely long-glandular-hairy; calyx lobes 5, 1–2 mm, outside and margin with short glandular hairs; corolla campanulate, bright yellow, 3–4 × ca. 4 cm; lobes 5, suborbicular, ca. 1.5 × 2 cm, apex emarginate; stamens 10, unequal, 1.2–2.5 cm, filaments entirely glabrous or pubescent only at base, anthers oblong, brownish yellow, ca. 3 mm; ovary columnar-conical, 5–7 mm, sparsely shortly glandular-hairy; style ca. 2 cm, base glandular, otherwise glabrous, stigma slightly expanded. Capsule slender, curved, 25–30 × ca. 4 mm, glands persistent. Fl. May–Jun, fr. Aug–Oct.
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