Operculum (Botany)
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In botany, operculum may be used to describe any of the following:
- A flap of the sporangium of a moss, covering the peristome (appendages surrounding the mouth of a moss capsule).
- The cap of the ascus in certain ascomycetous fungi.
- The bud cap covering the flowers of Eucalyptus and Corymbia trees which falls off as they open.
- The covering of a pyxidium (capsule whose upper part falls off when the seeds are released) of a plant, such as the plantain.
- The flared leaflet that prevents a pitcher plant from accumulating rainwater.
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