Page 43 – Xylem portion of a leaf vascular bundle
Fig. 36 . Xylem portion of a leaf vascular bundle. Transverse section of the xylem portion of a vascular bundle in a fully developed leaf. bs, cells of bundle sheath; la, lacuna formed by the pulling away of the surrounding parenchyma from the protoxylem elements, the spiral and annular elements (ae); v, vessel; xp, xylem parenchyma cell. X340.