Abstract: The study of the stem's secondary xylem of Rhus chinensis Mill reveals that perforation plate is simple perforation plate. There are 4 types vassel elements with different location and number of simple perforation on vassel element wall: these is only one simple perforation plate in the middle of the vassel element, and with helical thickening; each end of the vassel element has a simple perforation plate, and with helical thickening; each end of the vassel element has a simple perforation plate, and with reticular thickening; there are 3 simple perforation plates, and one end has two simple perforation plates, and the other end has one simple perforation plate. There are also helical tracheids and septate fibres in the secondary xylem. It is ring porous wood. The ray is heter geneous ray.

Key words: Rhus chinensis Mill, hetergeneous ray, simple perforation plate