51�Թ�

C–F, development of the spore fruit, × 300. ar. archicarp.

H, the spore sac removed from the spore fruit, × 150.

The spore fruit in these forms is often of considerable size, and, as their name indicates, is open, having the form of a flat disc or cup.

Similar in structure and development to Coprinus are all the large and common forms; but they differ much in the position of the spore-bearing tissue, as well as in the form and size of the whole spore fruit.

The spore fruit is more highly developed than in the liverworts, but never contains elaters.