1. LONG Zhu Tau for tree plants. Tree cylindrical, more upright; flowers dense. Mainly used for viewing. 2. trees, 3-8 m tall; crown broad and flat; bark dark brown, scaly rough old time; branchlets slender, hairless, shiny, green, into the red sunny place, with lots of small leather hole; winter buds conical, blunt tip, pubescent outside, often in clusters of 2-3, in the middle of the buds, both sides of the flower buds