Litchi trees are tall, with a height of more than 16.0m, a crown diameter of more than 15.0m and a stout trunk. The bark is rough and slightly cracked, but it is smoother than longan, grayish white, taupe or dark brown. The trunk surface of young trees is smooth, and it is green, gray, black and brown due to different varieties; The trunk of big trees is mostly taupe or dark brown, and the bark is rough and slightly cracked, and a few are smooth. There are also differences in skin color and roughness of different varieties of trees.

Trunk height and crown size are related to soil, varieties, propagation methods and cultivation management: poor soil layer or high groundwater level, small crown; The soil layer is deep and fertile, and the crown is large. The trunk of the grafted plant is not obvious, mostly 3-4 trunks, which are multi-trunk type and the crown is semi-circular with an opening; Seedling with obvious trunk, single stem type and round crown. Litchi trunk wood texture is delicate and reddish brown.