仿栗(杜英科,猴欢喜属)为常绿乔木,树干端直,高达20余米。叶空、纸质、无毛,狭卵形或矩圆状,长9—22厘米,宽3—7.4厘米,顶端渐尖,基部钝或宽楔形,边缘有浅锯齿,侧脉8—9对,叶柄长1.5—3厘米。花朵生于小枝顶端或小枝上部叶腋,绿白色,稍下垂。蒴果木质,近球形,裂成4—5瓣,密生刺毛,长0.5—1.2厘米。室内部为紫色,各有种子一颗,黑色有光泽,下半部为赤褐色,被假种皮所包。胚直生,有叶状子叶及丰厚胚乳。仿栗6—7月开花,9月下旬果实成熟,球果开裂,种子脱落。因此,采种应在刺毛变紫时进行。种子及假种皮均可榨油。经分析,种子不去假种皮含油量为58.28％。据桑植县 Imitation chestnut (Du Yingke, Monkey Happy) is an evergreen tree, trunk straight, up to 20 meters. Leaves empty, papery, glabrous, narrowly ovate or oblong, 9-22 cm long, 3-7.4 cm wide, apical apex, base obtuse or broadly cuneate, margin serrulate, lateral veins 8-9 pairs Petiole length 1.5-3 cm. Flowers born in the top of the sprig or arbor upper axils, greenish white, slightly sagging. Capsule woody, subglobose, split into 4-5 petals, densely hairs, 0.5-1.2 cm long. Indoor purple, each with a seed, black and shiny, the lower part of auburn, is covered by the aril seed coat. Straight embryo, leaf cotyledons and rich endosperm. Imitation chestnut flowering in June-July, late September mature fruit, cracking cones, seeds fall off. Therefore, the seeds should be carried out when the bristles become purple. Seed and leave the seed coat can be pressed oil. After analysis, the seeds do not leave the seed oil content of 58.28%. According to Sangzhi County