Shrubs, 3–5 m tall; branches stout, greenish or brownish, ca. 5 mm in diam. below inflorescence, glabrous. Petiole slender, flat adaxially, rounded abaxially, 15–25 mm, glandular; leaf blade thinly leathery or leathery, elliptic to oblong-elliptic or obovate-elliptic, 5–9 × 2.5–5 cm; base subcordate or rounded; margin reflexed; apex rounded, apiculate; both surfaces glabrous; abaxial surface yellowish green; adaxial surface deep green; midrib slightly raised abaxially, slightly grooved adaxially; lateral veins 14–18-paired, inconspicuous abaxially, slightly prominent adaxially. Inflorescence racemose-umbellate, 12-or 13-flowered; rachis 15–20 mm, yellowish hairy. Pedicel ca. 2 cm, with branched setae; calyx lobes 5, ca. 1.5 mm, triangular, outer surface setose; corolla funnelform-campanulate, base narrow, white, with or without purplish red spots, 2.5–3 cm, lobes 5, suborbicular, ca. 1 × 1.5 cm, apex rounded; stamens 10, unequal, 1.5–2 cm, filaments pilose at base; ovary cone-shaped, ca. 6 mm, densely covered with glands; style ca. 2 cm, glabrous; stigma slightly expanded. Capsule terete, usually curved, 15–20 × 5–6 mm. Fl. May-Jun.
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