Macro photograph of a longitudinally cut cowslip (Primula veris) flower. Just below the opening of the petals are the male reproductive structures, the stamens. Each stamen consists of a stalk-like filament and an ovoid anther, where the pollen grains (deep yellow) are produced. The female reproductive parts of the flower, the pistil, is at the bottom of the flower. At the very bottom is the ovary with the style (stalk) and stigma (spherical) rising from it. Pollen grains land on the stigma and burrow down the style to the ovary where they fertilise ovum (egg) cells, that then form seeds. Magnification: x3 when printed at 15cm tall.