Operculum (botany)

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The flower buds of Eucalyptus erythrocorys have a large, bright red operculum.

An operculum or (in plural) opercula are botanical terms describing a certain structure or structures of certain vascular plants, mosses, or fungi which act as a cap, flap, or lid. In vascular plants, an operculum may also be called a bud cap.

Examples of structures identified as opercula include:

See also[edit]