part_of part of part of adjacent to adjacent to adjacent_to xylem seed tracheid bar A portion of xylem (PO:0005352) tissue that is a distinct ring-like structure composed of tracheids (PO:0000301), that is part of a seed (PO:0009010) and surrounds the hilum (PO:0020063) and forms a groove in the surface of the pericarp (PO:0009084) immediately adjacent to the hilum. Found some taxa, such as Phaseolus. PO:0019026 PO_GIT:434 barra de la traqueida (Spanish, exact) plant_anatomy 仮導管の筋、縞 (Japanese, exact) hilum