Illustration from 1911 Encyclopædia Britannica, article BRYOPHYTA.

Original caption: FIG. 3.—Pellia epiphylla.

A, Longitudinal section of thallus at the time of fertilization. an, Antheridia; ar, archegonia; in, involucre.

B, Longitudinal section of almost mature sporogonium attached to the thallus. in, Involucre; cal, calyptra; f, foot; s, seta; caps, capsule (semi-diagrammatic).

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