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Annulus (botany)

An annulus in botany is for ferns an arc or a ring of specialized cells on the sporangium. These cells are arranged in a single row, and are associated with the release or dispersal of spores. In mosses it is a ring of cells around the tip of the sporangium. In flowers it is a ring of hairs within the flower tube.

Ferns, Mosses & Overview

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Ferns

Leptosporangiate fernsSpore dispersalLeptosporangiate fernsDehiscenceSpores
6 related topics

Mosses

Mosses
1 related topics

Overview

Sporangium
1 related topics

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Overview

Ferns

Mosses

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Annulus (botany)

Nodes12
Edges11
Triples0
Avg. degree1.83
Density0.166667
Components1

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Important terminology

sporangium annulus cells spores ring ferns mosses dispersal water around within leptosporangiate walls allow tip hairs flower tube spore flowering

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SubjectPredicateObjectConfidenceSrc

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