厚皮酒饼簕 hou pi jiu bing le

Trees 2-5 m tall. Branchlets, leaves, and petioles with short crisped trichomes but glabrescent. Young branchlets slightly flat, with or without spines. Petiole 6-10 mm, adaxially narrowly canaliculate; leaflet blade narrowly elliptic to elliptic-lanceolate, 10-17 × 3-6 cm, dark green to yellowish green when dry, secondary veins numerous and conspicuous, base rounded, margin sinuate, apex acuminate and rarely emarginate at tip. Inflorescences axillary, racemose, 1-2 cm, 3-9-flowered; peduncle thinly pubescent. Flowers 4-merous. Pedicel thinly pubescent. Calyx lobes ovate-triangular, apex acute. Petals white, 6-8 mm. Stamens 8, slightly shorter than petals; filaments broad, distinct or sometimes cohering in phalanges, apex acute. Disk 1/4-1/3 as long as ovary. Ovary ellipsoid, with 4 large pale oil glands, 3- or 4-loculed, with 1 or 2 ovules per locule, apex narrow; style 4-5 mm. Fruit globose, 1.5-2 cm or more in diam., oil glands numerous, large, and conspicuously concave when dry; exocarp ca. 1.5 mm thick. Seeds broadly ellipsoid, 10-12 × 6-9 mm, narrowed at both ends; embryo solitary. Fl. Apr-May, fr. Oct-Dec.

Forests by rivers in valleys; 200-400 m. SW Guangxi [NE Vietnam].