calyptra

/kuh-lip-truh/US // kəˈlɪp trə //UK // (kəˈlɪptrə) //

钙钛矿,钙质,钙化剂,钙化

Definitions

n.名词 noun

1
Botany.
- : Also called cap. a hood or hoodlike part, as the lid of the capsule in mosses.
- : a root cap.

The calyptra is half-cleft, and the lid conical and shortly beaked.
The calyptra (fig. 24) is half-cleft (dimidiate) and very hairy.
In Calyptra Equestris, it has two prominent points, and is described as bi-furcated (fig. 18).
The Calyptra may be known from Crepidula by the septum, which in the latter is a flat plate reaching half way across the cavity.
Involucral leaves coalescent into an oblong truncate hairy tube, blended in our species with the calyptra; perianth none.