Tree height reaches 6 to 15 m. The branches are green and have fine star-like hairs in the new branches, but the epidermis splits vertically when it becomes 2 years old, and becomes dark purple brown when it peels off. The bark is grayish black and smooth at first. The leaves are alternating, the leaf blades are 10 to 20 cm long and 6 to 20 cm wide, and fall from oval to wide oval, the tips are short and caudate, the base is round or wide wedge-shaped, and the edges are There are fine tooth-like saw blades with sharp tips. Star hair grows densely on the back of the leaves and turns grayish white. The whole inflorescence is 8 to 17 cm long and hangs down from the tip of the branch. The corolla is 1.7 to 1.9 cm in length and is deeply divided into five. The fruit is an oval shape with a diameter of 1.5 cm, with a fruit tip, slightly tipping, and star-shaped hair densely growing on the fruit epidermis. There is one seed, and when it ripens, the skin peels vertically, and the fruit falls with brown seeds, leaving a cup-shaped cocoon.