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Term Definition
Ovule The organ that after fertilization becomes the seed. The ovule in angiosperms contains the embryo sac with an egg cell, several other cell types, and is enclosed within the locule of the ovary. Cross section of an ovary of a red ice plant. Photo by S. A. Mori.
Ovule anatropous Referring to a curved downward ovule in such a way that the micropyle is close to the funicular attachment. A mature megagametophyte of an angiosperm. Drawing by M. Sashital.
Ovule campylotropous Referring to an ovule in which the axis is at an approximately right angle to its stalk (funicle). Ovule orientation. Drawing by M. Sashital.
Ovule orthotropous Referring to a straight ovule in which the micropyle is positioned in a straight line and opposite the funicular attachment; referring to a growth habit in which the growing apex is oriented vertically. Ovule orientation. Drawing by M. Sashital.
Unitegmic ovule An ovule with one integument. Unitemic and bitegmic ovules. Drawing by C.-H. Tsou.