1. Scleropyrum wallichianum (Wight & Arnott) Arnott, Mag. Zool. Bot. 2: 550. 1838.
硬核 ying he
Trees 4-10 m tall. Branches grayish green, strong and thick, smooth, spines sometimes present. Petiole thick, 6-10 mm; leaf blade 9-17 × 5-7 cm, glabrous or sparsely pubescent, abaxially pale green, adaxially deep green, ± glossy, midvein adaxially depressed, abaxially prominent, lateral veins 3 or 4 on each side, lower 2 pairs almost reaching leaf apex, tertiary veins patent and netlike, base subrotund or cuneate, apex obtuse or acute. Inflorescences solitary, paired, or a few in fascicles, 2-2.5 cm, yellow tomentose; bracts narrowly lanceolate, ca. 2 × 0.7 mm, villous abaxially, caducous. Perianth pale yellow to reddish yellow, ca. 3.8 × 5.5 mm, lobes 5, ovate, ca. 2 × 1.5 mm, apex subacute, abaxially villous, hair short near base or tomentose, adaxially with a tuft of hair behind each stamen. Stamen filaments ca. 1.5 mm. Disk depressed in middle, ca. 1.8 mm in diam. Style 0.8-1 mm; stigma shallowly 3- or 4-lobed, sunken in middle. Drupe orange or orange-red when mature, 3-3.5 × 2.3-2.5 cm, glabrous, glossy, apex nipple-like, persistent perianth not conspicuously enlarged, 2-2.5 mm in diam. Fl. Apr-May, fr. Aug-Sep.
Forests, slopes, valleys; 600-1700 m. Guangxi, Hainan, Yunnan [Cambodia, India, Laos, Malaysia, Myanmar, Sri Lanka, Thailand, Vietnam].
The seeds contain more than 67% oil, which is suitable as raw material for lubricants and soap. The young shoots and mature fruits are edible.