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Definition of Calyptra
1. Noun. The hood or cap covering the calyx of certain plants: e.g., the California poppy.
Definition of Calyptra
1. n. A little hood or veil, resembling an extinguisher in form and position, covering each of the small flasklike capsules which contain the spores of mosses; also, any similar covering body.
Definition of Calyptra
1. Noun. (botany) In bryophytes, a thin, hood-like tissue that forms from the archegonium and covers the developing sporophyte. ¹
¹ Source: wiktionary.com
Definition of Calyptra
1. a hood-shaped organ of flowers [n -S]
Medical Definition of Calyptra
1. In mosses, a cap-like structure covering or partly covering the capsule and derived from the neck of the archegonium, in a flower, a cap covering the stamens and carpels in the bud and formed by fusion or cohesion of perianth parts. (09 Oct 1997)
Lexicographical Neighbors of Calyptra
Literary usage of Calyptra
Below you will find example usage of this term as found in modern and/or classical literature:
1. Manual of the Mosses of North America by Leo Lesquereux, Thomas Potts James (1884)
"Plant, calyptra, capsule with operculum, and two 2-cleft and two teeth of the
... Plant, calyptra, capsule and operculum together with the pedicel and ..."
2. Botany by Geological Survey of California, William Henry Brewer, Sereno Watson, Asa Gray (1880)
"Flowers terminal, the male discoid or capitate. calyptra conic or ... Flowers mostly
dioecious, the male discoid and proliferous. calyptra ..."
3. The London Journal of Botany by Sir William Jackson Hooker (1846)
"... Br. et Schimp. but is much larger, has a more hairy calyptra, the setae are
longer and the ... calyptra sulcata, ..."
4. Manual of the Botany of the Northern United States by Asa Gray (1859)
"Plant, the same enlarged, capsule with operculum, the same covered by the calyptra,
two teeth of the peristome, with a portion of the annulus, and calyptra ..."
5. Muscologia Britannica: Containing the Mosses of Great Britain and Ireland by William Jackson Hooker, Thomas Taylor (1827)
"Capsules unopened and expanded, and calyptra of A. alpina.* SPHAGNUM. Capsules with
the elongated Receptacle and portion of the calyptra of S. obtusifolium. ..."
6. Proceedings of the Royal Irish Academy by Royal Irish Academy (1874)
"Capsule small, with a short lid; striated when dry ; 8-ribbed; teeth 16; red
coloured; cilia 16; calyptra campanulate, smooth, Capsule thin; contracted and ..."
7. Family Lyceum by Josiah Holbrook (1854)
"... k- capsule with calyptra attached. I propose in this and subsequent papers,
to lay before the Academy a description, accompanied with figures, ..."
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