The capsule in both families is spherical, with a bistratose wall; the outer cell layer usually bears nodular thickenings; the inner layer (of nearly equally large cells) lacks the regular semiannular or annular thickenings of most other leafy liverworts
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annular — adjective /ˈænjələ,ˈænjʊlə,ˈænjəlɚ/ a) Pertaining to, or having the form of, a ring; forming a ring; ringed; ring shaped; as, annular fibers; in the shape of an annulus. The capsule in both families is spherical, with a bistratose wall; the outer … Wiktionary
semiannular — adjective Having a shape resembling part of a ring or incomplete circular band. The capsule in both families is spherical, with a bistratose wall; the outer cell layer usually bears nodular thickenings; the inner layer (of nearly equally large… … Wiktionary
