Found in bryophytes. The capsule annulus is located at the base of an operculum. Upon capsule maturation, cell separation in the annulus allows the operculum to separate from the capsule, aiding in spore dispersal.

rwalls

2010-10-27T11:16:33Z

A dehiscence zone (PO:0025092) that is part of a spore capsule.

spore capusule annuli (exact, plural)

胞子蒴（さく）環帯 (Japanese, exact)

anillo de la c&#225psula de musgos (Spanish, exact)

capsule dehiscence zone (exact)

plant_anatomy

PO:0025093