Trees to 20 m tall. Branches tomentose when young. Petiole 2-7 mm, tomentose; leaf blade elliptic, ovate, or oblong, 8-15[-30] × 5-10[-16] cm, secondary veins ca. 16 on each side of midvein, base obliquely rounded to cordate, apex acute to shortly acuminate. Inflorescences leaf-opposed or on short few-leaved branches, cymose, 3-6-flowered. Peduncle 6-25 mm, tomentose; bracts minute, caducous. Pedicel 5-10 cm, slender; bracteoles similar to bracts. Torus glabrous. Sepals and outer petals ovate-triangular, 2-8 × 1.5-3.5 mm; inner petals dark brown, ovate-lanceolate to lanceolate-rhombic, ca. 10[-18] × 6[-10] mm, outside with very dense appressed golden hairs, inside glabrous. Carpels many, pubescent; ovules 2 per carpel, stigma clavate. Monocarp stipes 5-8 mm; monocarps globose to ovoid, ca. 20 × 16 mm, pilose. Fl. May, fr. Jul. 2n = 18.