ClipArt ETC
"Lengthwise section through root-tip of Indian corn. w, root-cap; i, younger part of cap; z, dead cells separating from cap; s, growing point; o, epidermis; p', intermediate layer between epidermis and central cylinder; p, central cylinder; d, layer from which the root-cap originates." -Bergen, 1896

Corn Root Tip

"Lengthwise section through root-tip of Indian corn. w, root-cap; i, younger part of cap; z, dead cells…