Coloured scanning electron micrograph (SEM) of the anther of a flower of the small-leaved lime (Tilia cordata), with several pollen grains (yellow) visible. Anthers are the male parts of a flower, and produce pollen. Pollen grains contain the male gametes of the plant, and travel to the female stigma to fertilise the egg (or ovule) to form the plant's seeds. Pollen from flowering plants is usually spread by insects or wind. Magnification: x70 when printed at 15cm wide.