The Collaborative International Dictionary
orthogamy
orthogamy \or*thog"a*my\, n. [Ortho- + Gr. ? marriage.] (Bot.) Direct fertilization in plants, as when the pollen fertilizing the ovules comes from the stamens of the same blossom; -- opposed to heterogamy.
Wiktionary
orthogamy
n. (context botany English) fertilization of the ovules of a plant by pollen from the same plant