Definition of geitonogamy in US English:



  • The fertilization of a flower by pollen from another flower on the same (or a genetically identical) plant.

    Compare with xenogamy
    • ‘Because geitonogamy requires that individual pollinators visit more than one consecutive flower on a plant, I quantified the relation between the number of flowers open on a branch and the number visited sequentially by foraging bees.’
    • ‘Inefficient beetle-pollination and the automimicry system via asynchronous flowering might be responsible for the high level of pollen shortage and frequent geitonogamy.’
    • ‘Both species use a mixed breeding system, consisting of xenogamy, geitonogamy, and autogamy; agamospermy is unimportant.’
    • ‘However, successful geitonogamy likely occurs because flowers at different stages of development are present at any one time on a plant and pollinators appear to move pollen effectively between such flowers.’
    • ‘Protogyny may also reduce geitonogamy if the flowers on an inflorescence develop so that all open flowers are in either male or female phase at any given time.’


Late 19th century: from Greek geitōn, geitono- ‘neighbor’ + -gamos ‘marrying’.