calyptra

Thân thiện

The gardener gently removes the calyptra from the poppy bud.

Definition

Noun: A calyptra is a protective hood or cap that covers and encloses the calyx (the collective term for the sepals) of a flower in some plant species, particularly before the flower opens. It is often a temporary structure that detaches or falls off as the flower bud matures and blooms.

Examples of Usage

• Noun:
  • The botanist carefully removed the calyptra to examine the developing flower bud underneath.
  • In the California poppy, the calyptra is a distinctive feature that is shed as the petals unfold.

Advanced Usage

• Botanical Context: The term is used almost exclusively in botanical descriptions and scientific literature to describe a specific morphological feature of certain plant families.
  • The presence of a calyptra is a key identifying characteristic for some species within the Papaveraceae family.

Variants and Related Words

• Operculum (n): In botany, this is a related term often used for a lid or covering, especially in mosses and eucalyptus buds. While similar, an operculum is not always synonymous with a calyptra, which is specific to floral parts.
• Calyx (n): The whorl of sepals, which the calyptra covers.

Synonyms

• Hood
• Cap
• Covering

Related Phrases/Idioms

There are no common idioms or phrasal verbs associated with this specific, technical botanical term.

Học thuật

Noun

1. the hood or cap covering the calyx of certain plants: e.g., the California poppy