褐背蒲桃 he bei pu tao

Trees, to 14 m tall. Branchlets blackish brown when dry, terete; old branches brown. Petiole 1-1.2 cm; leaf blade elliptic, 6.5-9.5 × 3-4 cm, leathery, abaxially reddish brown when dry, adaxially blackish brown and not glossy when dry, adaxially with numerous small glands, secondary veins dense, 1-1.5 mm apart, at an angle of ca. 80° from midvein, abaxially slightly raised, and adaxially inconspicuous, intramarginal veins ca. 1 mm from margin, base obtuse to broadly cuneate and usually oblique, apex acute and with a 5-10 mm cusp. Inflorescences terminal or subterminal, paniculate cymes, 4-6 cm; peduncle 2-3 cm; secondary peduncle 1-1.5 cm. Flower buds obovoid, ca. 6 mm. Hypanthium obconic, 4-5 mm. Calyx lobes shortly angular. Petals distinct, suborbicular, ca. 2.5 mm in diam. Stamens ca. 3 mm. Style 4-5 mm. Fl. Nov.

● Dense forests in valleys, on rocks next to water. Hainan (Dongfang).