Evening primrose (Oenothera biennis) pollen grain Science Image

Ref: 80200176



Evening primrose pollen. Coloured scanning electron micrograph (SEM) of an evening primrose (Oenothera biennis) pollen grain. Pollen grains are the male gametes (sex cells) of a plant. Magnification: x262 when printed 10 centimetres wide.