When the pollen from one plant falls on the stigma of other flower of the same plant is

When the pollen from one plant falls on the stigma of another flower of the same plant is Geitonogamy.
Geitonogamy is when pollen is exported using a vector (pollinator or wind) out of one flower but only to another flower on the same plant. It is a form of self-fertilization.
In flowering plants, pollen is transferred from one flower to another flower on the same plant, and in animal-pollinated systems, this is accomplished by a pollinator visiting multiple flowers on the same plant.