calyptran.

/kəˈlɪptrə/

Forms: In 1700s calyptre.

Etymology: modern Latin < Greek καλύπτρα covering, veil, < καλύπτειν to cover. Compare French calyptre.

Botany.

A hood or cover; spec.

a. the hood of the sporecase in mosses.

ΘΚΠ

the world > plants > part of plant > part defined by form or function > [noun] > hood-, cap-, or lid-like part

calyptra1753

the world > plants > particular plants > moss > [noun] > parts of

moutha1398

fimbria1752

calyptra1753

veil1760

lid1776

apophysis1785

operculum1788

peristoma1792

peristome1799

peristomium1806

hair-point1818

vaginula1818

perigynium1821

vaginule1821

gemma1830

paraphyllium1832

tympanum1832

perigon1857

pseudopodium1861

commissure1863

ocrea1863

cap1864

chaeta1866

struma1866

membranulet1891

pyxis1900

pseudopod1914

annulus-

1753 Chambers's Cycl. Suppl. Calyptra.

1777 S. Robson Brit. Flora 26 A calyptra is the calyx of a Moss, covering the fructification like a hood.

1785 T. Martyn tr. J.-J. Rousseau Lett. Elements Bot. xxxii. 494 A lidded capsule, covered with a smooth calyptre.

1807 J. E. Smith Introd. Physiol. & Systematical Bot. 402 Mosses, which have..a hood-like corolla, or calyptra, bearing the style, and concealing the capsule.

1858 E. Lankester & W. B. Carpenter Veg. Physiol. (new ed.) §736 The calyptra or hood.

b. ‘the interior membranaceous and often hairy covering of the ovarium’ (de Candolle and Sprengel Philos. Plants 61).

ΚΠ

1830 J. Lindley Introd. Nat. Syst. Bot. 60 [Of the Mangrove Tribe] Calyx superior..with the lobes varying in number..occasionally all cohering in a calyptra.

Draft additions 1997

2. [ < French calyptre (used in this sense by Van Tieghem & Douliot 1888, in Ann. des Sci. Nat.: Bot. 8 11).] A thickened membrane of parenchymatous cells which protects the growing root of a vascular plant; a root-cap.

ΘΚΠ

the world > plants > part of plant > root > [noun] > root-cap

root cap1849

calyptra1898

1898 H. C. Porter tr. E. Strasburger et al. Text-bk. Bot. 15 A root may always be distinguished from a stem by the root-cap or calyptra sheathing its apex.

1914 M. Drummond tr. G. Haberlandt Physiol. Plant Anat. ii. 93 The inner apical envelope of the rootlet, or ‘calyptra’ is produced by the rootlet itself.

1960 C. R. Metcalfe Anat. Monocotyledons I. 581 Montemontini..refers to the occurrence of a sclerotic calyptra (Wurzelhaube) on the roots when young.

This entry has not yet been fully updated (first published 1888; most recently modified version published online December 2020).

单词	calyptra
释义	calyptran. /kəˈlɪptrə/ Forms: In 1700s calyptre. Etymology: modern Latin < Greek καλύπτρα covering, veil, < καλύπτειν to cover. Compare French calyptre. Botany. A hood or cover; spec. a. the hood of the sporecase in mosses. ΘΚΠ the world > plants > part of plant > part defined by form or function > [noun] > hood-, cap-, or lid-like part calyptra1753 the world > plants > particular plants > moss > [noun] > parts of moutha1398 fimbria1752 calyptra1753 veil1760 lid1776 apophysis1785 operculum1788 peristoma1792 peristome1799 peristomium1806 hair-point1818 vaginula1818 perigynium1821 vaginule1821 gemma1830 paraphyllium1832 tympanum1832 perigon1857 pseudopodium1861 commissure1863 ocrea1863 cap1864 chaeta1866 struma1866 membranulet1891 pyxis1900 pseudopod1914 annulus- 1753 Chambers's Cycl. Suppl. Calyptra. 1777 S. Robson Brit. Flora 26 A calyptra is the calyx of a Moss, covering the fructification like a hood. 1785 T. Martyn tr. J.-J. Rousseau Lett. Elements Bot. xxxii. 494 A lidded capsule, covered with a smooth calyptre. 1807 J. E. Smith Introd. Physiol. & Systematical Bot. 402 Mosses, which have..a hood-like corolla, or calyptra, bearing the style, and concealing the capsule. 1858 E. Lankester & W. B. Carpenter Veg. Physiol. (new ed.) §736 The calyptra or hood. b. ‘the interior membranaceous and often hairy covering of the ovarium’ (de Candolle and Sprengel Philos. Plants 61). ΚΠ 1830 J. Lindley Introd. Nat. Syst. Bot. 60 [Of the Mangrove Tribe] Calyx superior..with the lobes varying in number..occasionally all cohering in a calyptra. Draft additions 1997 2. [ < French calyptre (used in this sense by Van Tieghem & Douliot 1888, in Ann. des Sci. Nat.: Bot. 8 11).] A thickened membrane of parenchymatous cells which protects the growing root of a vascular plant; a root-cap. ΘΚΠ the world > plants > part of plant > root > [noun] > root-cap root cap1849 calyptra1898 1898 H. C. Porter tr. E. Strasburger et al. Text-bk. Bot. 15 A root may always be distinguished from a stem by the root-cap or calyptra sheathing its apex. 1914 M. Drummond tr. G. Haberlandt Physiol. Plant Anat. ii. 93 The inner apical envelope of the rootlet, or ‘calyptra’ is produced by the rootlet itself. 1960 C. R. Metcalfe Anat. Monocotyledons I. 581 Montemontini..refers to the occurrence of a sclerotic calyptra (Wurzelhaube) on the roots when young. This entry has not yet been fully updated (first published 1888; most recently modified version published online December 2020). < n.1753
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