Description from Flora of China
Trees, evergreen. Leaves alternate; stipules early deciduous leaving distinct scars. Flowers axillary, fascicled, rust colored tomentose. Sepals (2--)4 or 5(or 6), imbricate. Corolla tubular, 5-merous; lobes linear, thick, each with 2 membranous appendages on back. Stamens 5, opposite to corolla lobes; staminodes 5, alternate with petal, thick, longer than stamens, abortive anther sagittate, margins irregularly denticulate. Ovary 5-celled. Style short. Fruit drupaceous with remnant of style at apex, globoid, glabrous or tomentose, 1--5-seeded. Seed scar oblong; endosperm oily.
About three species: Laos, Vietnam; two species in China.
The seeds of all species are rich in oil.