Tree to 8 m tall; d.b.h. to 5 cm; bark distinctly striate, grey; young branches drying black, glabrous; old branches grey, striate, glabrous. Petioles ca. 2 mm long, ca. 1 mm in diameter, glabrous, leaf lamina inserted on side, grooved adaxially. Leaf lamina 10-12 cm long, 3-4 cm wide, length:width ratio 2.5-3, narrowly obovate to narrowly elliptic, sometimes narrowed towards the base, base acute to rounded, apex acuminate, acumen 1-1.5 cm long, glabrous; midrib glabrous on both sides; secondary veins 10-14 pairs, uniformally curving upwards, glabrous. Flowers single, leaf-opposed, pendulous. Flowering pedicels 17-20 mm long, 0.6-0.8 mm in diameter, glabrous. Upper bract inserted in upper half of pedicel, 5-9 mm long, 3-5 mm wide, length:width ratio 1.4-1.6, ovate, base auriculate-clasping, apex acute, glabrous on both surfaces, pale green; margins straight, with short straight hairs or glabrous. Sepals 6-8 mm long, 3-4 mm wide, length:width ratio ca. 2, elliptic, apex rounded to acute, glabrous on both surfaces, green; persistent in fruit, margins entire, with short straight hairs or glabrous. Outer petals 20-26 mm long, 6-8 mm wide, length:width ratio 3-4.3, narrowly elliptic, base truncate, apex acute, glabrous, light green; held horizontally at anthesis, margins undulate, with short straight hairs or glabrous. Inner petals 10-17 mm long, 4-7 mm wide, length:width ratio 2-3, clawed ovate, base truncate, apex long-acuminate, densely covered with short straight hairs at base of inside surface and all over outside, white with purple base at anthesis, connivent by the center of lamina over the receptacle; margins straight; claw 4-5 mm long, claw:inner petal ratio 0.3-0.4, glabrous, white to pale green, tinged purple at apex. Receptacle ca. 2 mm in diameter, flat. Stamens in 3-4 rows, ca. 0.6 mm long, white; connective shield ca. 0.1 long, glabrous, those of innermost whorl extending slightly over ovary wall. Ovary ca. 1 mm long, ca. 0.5 mm wide; stigma ca. 0.8 mm in diameter, glabrous, light yellow. Fruiting pedicels 1,8-2,5 cm long, 3-4 mm in diameter, woody, glabrous, green. Fruits ca. 1.5-2.5 cm long, ca. 2-2.5 cm in diameter, length:width ratio 0.75-1, broadly ovoid, constricted around seeds when dried, slightly lumpy when fresh, glabrous, green with white dots; pericarp 1-2 mm thick. Seeds 10-12 mm long, 9-10 mm wide, transversely broadly ellipsoid; testa smooth, light brown; raphe slightly thickened, brown; hilum 4-5 mm wide, 2-2.5 mm wide, elliptical.