autogamy

As nouns the difference between autogamy and geitonogamy

is that autogamy is self-fertilization, the fertilizing pollen being derived from the same blossom as the pistil acted upon while geitonogamy is transfer of pollen grains from the anther of a flower to the stigma of another flower of the same plant.

As nouns the difference between autogamy and auxosporulation

is that autogamy is self-fertilization, the fertilizing pollen being derived from the same blossom as the pistil acted upon while auxosporulation is the formation of an auxospore by gametic fusion or autogamy.