Coloured scanning electron micrograph (SEM) of the surface of a basil (Ocimum basilicum) leaf showing various trichomes (modified hairs). The hair-like trichomes (grey) protect the leaf against mechanical damage. The round trichomes (green and yellow) are glandular trichomes that release etheric oils when touched that are distasteful to pests and protect the leaf against being eaten. Magnification: x280 when printed at 15cm wide.