Fig. 14.—Radial longitudinal section of wood of oak (highly magnified). M.Str, medullary rays; Trach, tracheids; Gef (to the left), smaller pitted vessels; Librf, wood-fibers; H.P., wood-parenchyma. The large mass of tracheids to the left of the center of the figure lies over one of the broad pitted vessels. J.Gr, boundary of annual ring. (Kny.)
This page has been validated.