Apama hainanensis Merrill & W. Y. Chun, Sunyatsenia 2: 220. 1935.

Subshrubs to 1 m tall. Branchlets densely brown-yellow pubescent, nodes swollen, internodes 2-5 cm. Petiole ca. 1 cm; leaf blade obovate or oblong, rarely ovate or elliptic, 20-30 × 8-12 cm, papery or thin leathery, both surfaces glabrous or with sparse hairs on veins, veins pinnate, 8-12 pairs, reticulate veins conspicuous, base subrounded, apex acute or acuminate. Racemes aggregated in cymes or corymbs, 3-5 cm. Pedicel pubescent; bracts lanceolate, 4-9 × 1.5-2.5 mm. Calyx purplish red, campanulate, ca. 1 × 1 cm; ring inconspicuous; lobes triangular, 3 × 4 mm. Anthers oblong. Style column robust, apex shortly 6-lobed; lobes linear-lanceolate, 1.5-3 mm. Fruit 4-angled, ca. 5 × 0.5 cm. Seeds oblong-globose, obtusely triangular, 3.5 × 2.5 mm. Fl. Aug-Dec, fr. Feb-Apr.

* Dense forests. Hainan.