Trees (7-)15-25 m tall. Young branches stout, with white lenticels; current year branchlets gray velutinous; terminal buds ovate, densely gray sericeous. Petiole 1.5-2.5 cm, gray velutinous; leaf blade oblong-elliptic to elliptic, (10-)16-26 × 4.5-8.5 cm, leathery, abaxially glaucous and appressed pubescent along midvein, adaxially dark green, glabrous, and becoming yellowish brown when dry, midvein abaxially raised, secondary veins 12-15 on each side of midvein, abaxially raised, and adaxially visible or slightly impressed, base cuneate to broadly cuneate, margin entire, apex bluntly acute to acuminate. Flowers solitary, ca. 3 cm in diam. Pedicel ca. 3 cm, stout, gray velutinous, with white lenticels; bracteoles 2, caducous, ovate, ca. 7 mm, gray sericeous. Sepals broadly ovate to suborbicular, (0.7-)1-1.2 cm, leathery, outside yellow velutinous, inside sericeous. Petals white, suborbicular, ca. 2.5 cm, outside basally sericeous. Stamens numerous, 8-10 mm; filaments basally adnate with petals. Ovary yellowish tomentose; style ca. 8 mm, glabrous; stigma 5, capitate. Capsule depressed globose, 1.5-2 × 2-2.5 cm; pericarp woody, splitting into 5 valves. Seeds together with wing ca. 10 × 6 mm. Fl. Jul, fr. Nov.
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