Typical mesomorphic leaf of a dicot: Detail of anatomy

Mesophyll differentiated into palisade & spongy parenchyma

A higher magnification view of a lilac (Syringa vulgaris) leaf showing a small glandular trichome on the abaxial surface, a two-layered palisade mesophyll, and site of a minor vein (in oblique section).

1 = adaxial epidermis, 2 = upper (first) layer of palisade mesophyll, 3 = lower (second) layer of palisade mesophyll, 4 = spongy parenchyma, 5 = abaxial epidermis, 6 = glandular trichome (in a leaf depression), 7 = minor vein (in oblique longitudinal section), 8 = nucleus with nucleolus