Shrub to 2.5 m high. Shoots and branchlets appressed-pubescent and hirsute. Leaves: petiole 2–2.5 mm long; lamina lanceolate, oblanceolate or elliptic, 5–14 cm long, 1.3–5 cm wide, obtuse, rounded or broadly acute at base, acuminate at apex, glabrous above except pilose midvein, sparsely appressed-pubescent below; secondary veins 13–16 pairs. Flowers solitary, axillary. Pedicel 2-4 mm long; bracts ovate, 1.5–2.2 mm long. Sepals broadly ovate, 4.5–5.5 mm long, 4–4.8 mm wide, abruptly acuminate, pubescent outside. Petals pale yellow. Outer petals very narrowly ovate, 30–40 mm long, 8–9 mm wide, attenuate, pubescent. Inner petals very narrowly ovate, 30–48 mm long, 7–9 mm wide, attenuate, pubescent, grooved, glabrous and crimson at base inside. Stamens 45–60, 1.2–2 mm long. Carpels 5–16; ovary 1.8–2 mm long; ovules 4–6. Apocarps obloid or subglobular, to 2 cm long, 1 cm wide, hirsute; stipe c. 1 mm long. Seeds 1–5.
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