Page 42 – Leaf bundle
Fig. 35 . Leaf bundle. Transverse section of a portion of the basal (i.e., non-chlorophyllaceous) region of a fully differentiated leaf, to show a large vascular bundle, cc, companion cell; gp, ground parenchyma; mp, metaphloem; mx, metaxylem; pp, protophloem; psc, presclerenchyma cells which form the fibrous cap on either side of the bundle later; px. protoxylem; sit, sieve tube; tr, trachea. X200.