海南厚壳树 hai nan hou ke shu

Trees ca. 8 m tall; bark gray; branchlets light gray, glabrous. Petiole 2-3 cm, glabrous; leaf blade lanceolate to oblong-lanceolate, 8-12 × 2-4 cm, base cuneate, margin entire, apex acute; lateral veins 4 or 5 pairs, reticulate veins inconspicuous. Cymes terminal and axillary, paniculate, 4-6 cm wide, glabrous; bracts lanceolate, 1.5-2 mm. Flowers sessile. Calyx ca. 1.5 mm; lobes ovate, ciliolate, apex acute. Corolla white, campanulate, ca. 3.5 mm, base ca. 1 mm wide; throat ca. 3 mm wide; lobes oblong, ca. 2 mm, slightly longer than tube, recurved. Filaments ca. 1.5 mm, inserted ca. 1.5 mm above base; anthers ca. 0.5 mm. Style ca. 2.5 mm, branches ca. 1.5 mm. Drupes unknown. Fl. Dec.

* Open forests; ca. 400 m. Hainan (Yaxian Xian).