Archegonial

_G_, archegonial branch of common liverwort, natural size. ❋ Douglas Houghton Campbell (N/A)

The very large, thin-walled spores escape on the decay of the capsule, which ruptures the archegonial wall irregularly. ❋ Various (N/A)

A. Longitudinal section of the very young sporogonium (f, f ') enclosed in the archegonial wall (b, h). ❋ Various (N/A)

Further stages of the development of the sporogonium (f) enclosed in the calyptra formed from the archegonial wall (c) and still bearing the neck (h). ❋ Various (N/A)

It remains for long enclosed within the calyptra formed by the further development of the archegonial wall and surmounted by the neck of the archegonium. ❋ Various (N/A)

The same holds even more obviously for the grouping of the stegocarpous forms into those in which the archegonial group terminates ❋ Various (N/A)

The archegonial groups occupy the apices of short branches (fig. 13, A.). ❋ Various (N/A)

The archegonial groups in _Corsinia_ are sunk in a depression of the upper surface, while in _Targionia_ they are displaced to the lower side of the anterior end of a branch. ❋ Various (N/A)

The upper portion of the archegonial wall is carried up as a calyptra on the sporogonium, which, as in _Sphagnum_, has no seta and is raised on a pseudopodium. ❋ Various (N/A)

The leaves below the archegonial group are frequently modified in size and shape, but the chief protection is afforded by a tubular perianth, which corresponds to a coherent whorl of leaves and grows up independently of fertilization. ❋ Various (N/A)

With the growth of the sporogonium the archegonial wall, which for a time kept pace with it, is broken through, the larger upper part terminated by the neck being carried up on the capsule as the calyptra, while the basal portion remains as a tubular sheath round the lower end of the seta (cf.figs. 16, C, and fig. 11, A, B). ❋ Various (N/A)