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In flowering plants, the operculum, also known as a calyptra, is the cap-like covering or "lid" of the flower or fruit that detaches at maturity. The operculum is formed by the fusion of
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has an opening covered by an operculum. When the operculum falls, the seed is sticky and is easily carried by animals that come into contact with it.
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251:. The calyptra is usually lost before the spores are released from the capsule. The shape of the calyptra can be used for identification purposes.
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have an operculum above the pitcher that serves to keep out rainwater that would otherwise dilute the digestive juices in the pitcher.
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of mosses usually opens when its operculum or "lid" falls off, exposing a ring of teeth that control the release of spores.
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and is usually shed as a single structure as the flower or fruit matures. The name is also used for the capping tissue of
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Ascomycete
Systematics : the Luttrellian Concept (Chapter 3 - The Operculate Ascus and Allied Forms)
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Calyptra on top of the brown spore capsule (sporophyte) of the moss
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venter that protects the capsule containing the embryonic
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356:"Pollen and anther characters in monocot systematics"
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Botanical term for a protective covering, hood or lid
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Mosses and other
Bryophytes, an Illustrated Glossary
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120: 'veil') is a cap-like structure in some
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19:"Calyptra" redirects here. For the moth, see
509:Reynolds, Don R.; van Brummelen, J. (1981).
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307:"Glossary of Botanical Terms"
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392:: A multidisciplinary study
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329:"Learn about eucalypts"
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256:sporangium
249:sporophyte
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170:Eucalyptus
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281:See also
237:calyptra
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179:but not
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158:root cap
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108:καλύπτρα
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215:capsule
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360:Grana
275:fungi
262:Fungi
202:exine
154:roots
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95:) or
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