Ⅰ、狗骨木1.形态特征、特性狗骨木为常绿乔木,高可达17米左右,树冠圆锥形,下枝垂,干通直光滑,树皮呈大小斑块状脱落后的退迹,由灰白色变为青色到浅褐色相间,小枝初被毛,后变光滑,圆筒形;单叶对生,全缘,椭圆形至长椭圆形,长5至12厘米,宽2至6厘米,顶端渐尖,基部阔楔形,两面均被短毛,两侧稍不对称,侧脉4至5对.3月中旬至下旬脱叶顿时换新叶;伞房状的聚伞花序生于 Ⅰ, dog bone wood 1. Morphological characteristics, characteristics Dog bone wood is evergreen trees, up to 17 meters high, the crown conical, the next branch hanging, straight through smooth, bark was the size of the patch after the fall off , Gray to cyan to light brown in color, branchlets first coat, later smooth, cylindric; leaves simple, entire, elliptic to oblong, 5 to 12 cm long and 2 to 6 cm wide , Apex acuminate, base broadly cuneate, both surfaces shorthaired, slightly asymmetrical on both sides, lateral veins 4 to 5 pairs. Leaflets absent from mid-March to late new leaves;