琉球暗罗 liu qiu an luo

Trees to 12 m tall. Branches dark brown, longitudinally reticulately striate when dried, glabrous. Petiole dark; leaf blade oblong-elliptic, 14-17 × 7-9 cm, thinly leathery, glabrous, midvein abaxially raised and adaxially flat, secondary veins 8 or 9, at ca. 45° to midrib, and then arcuately ascending, reticulate veins elevated on both surfaces, base rounded, apex acuminate. Inflorescences axillary, 1-6-flowered; peduncle 1-1.5 cm. Pedicel 2-3 cm, glabrous or sparsely shortly hairy. Sepals rounded-triangular, 3-5 mm. Petals green to yellowish green, narrowly lanceolate, 6-7 cm, subequal. Fruiting peduncle ca. 2 × 0.5 cm; pedicel 2.5-3 cm; monocarps black when mature, ellipsoid, 1.7-2.5 × 1.5-2 cm, longitudinally 2-grooved. Fl. Aug. 2n = 18.

Thickets on coral limestone at low elevations. Taiwan (Lan Yu) [Japan (Ryukyu Islands)].