Herkogamy
Videos
Herkogamy is the spatial separation of the anthers and stigma in hermaphroditic angiosperms. It is a common strategy for reducing self-fertilization.
Capparis spinosa, photographed in San Ġwann, Malta.
Pollen
Videos
Pollen is a powdery substance produced by most types of flowers of seed plants for the purpose of sexual reproduction. It consists of pollen grains, which produce male gametes.
Colorized scanning electron microscope image of pollen grains from a variety of common plants: sunflower (Helianthus annuus), morning glory (Ipomoea purpurea), prairie hollyhock (Sidalcea malviflora), oriental lily (Lilium auratum), evening primrose (Oenothera fruticosa), and castor bean (Ricinus communis).
Triporate pollen of Oenothera speciosa
Pollen of Lilium auratum showing single sulcus (monosulcate)
Arabis pollen has three colpi and prominent surface structure.