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WordNet

apogamy

n. (botany) development of an embryo without fertilization; especially the development in some ferns of a sporophyte from the gametophyte without fertilization

The Collaborative International Dictionary

Apogamy

Apogamy \A*pog"a*my\, n. [Pref. apo- + Gr. ? marriage.] (Bot.) The formation of a bud in place of a fertilized ovule or o["o]spore.
--De Bary.

Wiktionary

apogamy

n. (context botany English) asexual reproduction of a fully formed plant directly from a bud.