page_title: Annulus (botany)
section_title: Mosses
hierarchical_section_title: Annulus (botany) / Mosses
caption_attribution_description: English: Funaria hygrometrica Deutsch: Funaria hygrometrica, Wetteranzeigendes Drehmoos
context_page_description: An annulus in botany is 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.
context_section_description: In mosses, an annulus is a complete ring of cells around the tip of the sporangium, which dissolve to allow the cap to fall off and the spores to be released.
caption: Sporangium of the moss Funaria hygrometrica with well-defined annulus.
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