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calyptra
[ kuh-lip-truh ]
noun
- Also called cap. a hood or hoodlike part, as the lid of the capsule in mosses.
- a root cap.
calyptra
/ kəˈlɪpٰə; kəˈlɪpˌtreɪt /
noun
- a membranous hood covering the spore-bearing capsule of mosses and liverworts
- any hoodlike structure, such as a root cap
calyptra
/ ə-ĭ′ٰə /
- In some bryophyte plants, a structure that covers the young sporophyte as it develops within the tissues of its gametophyte parent. The calyptra, which consists of a thickening of the archegonium walls, eventually breaks open as the spore capsule grows.
- See root cap
Derived Forms
- calyptrate, adjective
Other yvlogs From
- ··ٰٱ [k, uh, -, lip, -treyt], adjective
yvlog History and Origins
Origin of calyptra1
yvlog History and Origins
Origin of calyptra1
Example Sentences
The ripped-off piece of its birthplace often remains stuck to the top of the sporophyte and is called a calyptra.
If not preserved in an envelope the calyptra and operculum are very apt to fall off and become lost.
Thallus decumbent, irregularly lobed, 1–2´ long, 3–5´´ wide; involucre none; pedicel ¾–1´ long, sometimes folded upon itself and remaining within the calyptra, the capsule thus appearing sessile; antheridia on elongated receptacles.—Wooded swamps.
The calyptra or veil is remarkably small, smooth, and membranous.
D, capsules of Bartramia: i, with; ii, without the calyptra.
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