A cell wall part that is the part of a wall of a vessel member and bears one or more openings (perforations).
Source:ISBN:0471245194,
GOC:PO_curators
Comment
Part of a vessel member (PO:0002003). May be simple, with one perforation, or multiperforate, with more than one perforation. Perforation plates are usually on the end walls of a cell, but may also be on the side walls.