The sporogonium is very similar throughout the group (figs. 8, 9).
The details of construction of the sporogonium are referred to below.
In none of the liverworts does the sporogonium develop by means of an apical cell, as is the rule in mosses.
Fertilization takes place about June, and the sporogonium is fully developed by the winter.
The sporogonium is of large size and highly organized, though it presents peculiar features in the peristome.
The sporogonium has a small foot, but the sterile cells among the spores do not develop into elaters.
In contrast to the sexual generation this stage is called the spore-bearing generation (sporogonium, sporophyte).
The perianth serves also to enclose and protect the sporogonium during its development.
Certain cells in the sporogonium of a moss are called mother-cells.
Notothylas resembles Anthoceros in its thallus, but the sporogonium is much smaller.