Self-pollination
Pollination of a flower by its own pollen, or by pollen from another flower on the same plant.
Also: selfing
Some plants can set seed with their own pollen. This is reliable, because it needs no partner and sometimes no pollinator. Garden peas and sweet peas usually pollinate themselves before the flower even opens, which is why Gregor Mendel could control his pea crosses so well. The cost is less variety in the offspring. Many plants avoid selfing with tricks such as ripening their anthers and stigmas at different times, or by rejecting their own pollen.