Page 70 – Trichome
Fig. 63 . Trichome. A. Surface view of the abaxial epidermis of the transition (i.e., sub-chlorophyllaceous) region of a mature leaf to show a cross section of the stalk of a trichome at the epidermal level; the head portion has been lost. Notice the irregular shape of the trichome accessory cells (tac) around the stalk (ts) and the thick walls of the surrounding epidermal cells which contain silica bodies (si). B. Longitudinal section of the transition (i.e., sub-chlorophyllaceous) region of a mature leaf to show the stalk of a trichome; the head portion has been lost. Notice the thick inner walls of the epidermal cells (sp) each containing a silica body (si). The transverse walls of the cells which form the stalk (tsc) have become coalescent with the outer walls of the adjacent epidermal cells. Also notice the three small hypodermal cells below the base of the stalk (stsc), and the other cells of the first hypodermal layer which are pitted (hc). X400.