Flower reproductive parts. Coloured SEM (scanning electron micrograph) of the reproductive parts of an unidentified flower. The smooth structure that runs diagonally from lower right to upper left is the upper part of the pistil (female reproductive structure). Seen here is the style (stalk-like) that supports the stigma at its tip. The ovary is not seen as it lies at the base of the pistil. The style is surrounded by the pollen sacs (anthers, male reproductive structures). The protective case that enclosed these structures before the flower opened is at upper left. Magnification unknown.