1. Noun
A whorl or set of bracts around a flower, umbel, or head.
2. Noun
A continuous marginal covering of sporangia, in certain ferns, as in the common brake, or the cup-shaped processes of the filmy ferns.
3. Noun
The peridium or volva of certain fungi. Called also involucrum.
4. Noun
a highly conspicuous bract or bract pair or ring of bracts at the base of an inflorescence
Vocabulary classified under Nature and environment
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