Shrub with a height of 1-2 meters. Branchlets and leaf axes are densely pubescent and scattered with slightly raised oil spots. There are 2 1-27 leaflets in leaves, as many as 4 1 in young plants, and sometimes only 15 leaflets adjacent to inflorescences. The leaflets are very asymmetrical, obliquely ovate, obliquely lanceolate or quadrangular, 2-9 cm long and 1-3 cm wide, and rarely larger or smaller. Petiole 2-5 mm long. Inflorescence terminal; Buds are spherical; Bracts opposite, tiny; Petals are white or yellowish white, ovoid or obovate, 2-3mm long and1-2mm wide; 8 stamens, alternating in length, attached to the inside of the petals when in bud, protruding out of the petals when in full bloom. The filaments are linear above the middle, knee-shaped in the middle and wide at the lower part, and the anthers have 1 oil spots above the connective. There are 1 oil spots around the upper corner of the ovary, which are densely gray-white villous and have short and thick styles. The fruit is oval, with a length of12-18mm and a width of 8-15mm. At first, it is coated, and when it matures, it turns from dark yellow to reddish to vermilion, with all the hairs falling off, and there are 1-2 seeds. The flowering period is April-May and July-August, and it still blooms in1October (Hainan). The fruiting period is August 8- 10/October.