CHAPTER II
THE EPIDERMIS AND PERIDERM
Leaf epidermis 59 Testa epidermis 63 Plant hairs 66 Forms of hairs 67 Papillæ 67 Unicellular hairs 69 Multicellular hairs 72 Periderm 80 Cork periderm 80 Stone cell periderm 85 Parenchyma and stone cell periderm 85