Illustration from 1911 Encyclopædia Britannica, article BRYOPHYTA.

Original caption: FIG. 11.—Funaria hygrometrica.

A, Leafy shoot (g) bearing a young sporogonium enclosed in the calyptra (c).

B, Similar plant with an almost mature sporogonium; s, seta; f, capsule; c, calyptra.

C, Median longitudinal section of a capsule, with the seta gradually widening into the apophysis at its base; d, operculum; p, peristome; a, annulus; c, columella; s, archesporium; h, air-space between the spore-sac and the wall of the capsule.

(From Goebel's Pflanzenmorphologie, by permission of W Engelmann)

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