Calyptra

This article is about a feature in plant morphology.
For other uses, see Calyptra (disambiguation).

Calyptra is a scientific term used in botany. It describes a feature in plant morphology.

Bryophytes

In bryophytes, the calyptra (plural calyptrae) is an enlarged archegonial venter that protects the capsule containing the embryonic sporophyte [1]. The calyptra is usually lost before the spores are released from the capsule. The shape of the calyptra can be used for identification purposes.[2]

Flowering plants

In flowering plants, the calyptra is a covering tissue for stamens and carpels. The name is also used for the capping tissue of roots, the root cap.

References

  1. ^ Ralf Reski (1998): Development, genetics and molecular biology of mosses. In: Botanica Acta. 111, 1-15.
  2. ^ Malcolm; Malcolm, Bill; Nancy (2006), Mosses and other Bryophytes, an Illustrated Glossary, Micro-Optics Press, p. 65, ISBN 0958222479