Naples garlic The structure of garlic could be mistaken for exquisite coloured glass. When a tiny stem section is stained with toluidine blue, a dye that builds up in the acidic parts of tissue, nucleic acids show up in blue. The dark spot is a bundle of vascular tissue that carries nutrients and fluids up the stem. The full image is a composite of 55 shots.
Rob Kesseler's Morphogenesis, SEM photograph of wild Portuguese flora, including orchids. Microfine sections of stems were stained to expose functional characteristics. Large format images constructed from up to 500 individual high magnification frames.