One of the mysteries of the English language finally explained.
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.’
- ‘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.’
- ‘Both species use a mixed breeding system, consisting of xenogamy, geitonogamy, and autogamy; agamospermy is unimportant.’
- ‘Inefficient beetle-pollination and the automimicry system via asynchronous flowering might be responsible for the high level of pollen shortage and frequent geitonogamy.’
- ‘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.’
Late 19th century: from Greek geitōn, geitono- ‘neighbour’ + -gamos ‘marrying’.
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