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Operculum (botany)
Botanical term for a protective covering, hood or lid / From Wikipedia, the free encyclopedia
"Calyptra" redirects here. For the moth, see Calyptra (moth).
In botany, an operculum (pl.: opercula) or calyptra (from Ancient Greek καλύπτρα (kalúptra) 'veil') is a cap-like structure in some flowering plants, mosses, and fungi. It is a covering, hood or lid, describing a feature in plant morphology.
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