Glossary of Botanical Terms:
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embryo sac: the female gametophyte, produced within the ovule. Fig. 21.
Fig. 21. Ovules. A, orthotropous ovule; B–F, ovules in longitudinal section: B, orthotropous ovule; C, hemitropous ovule; D, campylotropous ovule; E, amphitropous ovule; F, anatropous ovule.
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