Description from Flora of China
Barringtonia yunnanensis H. H. Hu.
Trees 15-30 m tall, to 1 m d.b.h., glabrous. Branches stout, ribbed; bark gray. Leaves in fascicles at branchlet tips, petiolate; petiole 2-4.5 cm, canaliculate; leaf blade adaxially glaucous when dried, obovate-oblong to oblong, 15-30 × 5-12 cm, papery, base cuneate, margin entire or inconspicuously dentate, apex acuminate; lateral veins in ca. 14 pairs. Spikes terminal or axillary on old branches, long, to 100 cm, pendulous. Flowers sessile. Calyx with tube 2.5-3 mm, becoming 2-4-lobed at anthesis; lobes elliptic to subovate, 0.7-1.3 cm, abaxially pubescent. Petals 4, white or pink-white, elliptic to subovate, 1.5-2 cm. Staminal tube ca. 2.5 mm; filaments pink-red, ca. 2.5 cm. Style filiform, ca. 3.5 cm. Fruit brown, fusiform, to 11 × 4 cm; exocarp pulverulent. Fl. and fr. almost year-round.
● Dense humid forests; 100-800 m. S and SE Yunnan.