Historical reference: Do not rely on this information. It is very old. About this collection
Jungermannia, a genus of liver-worts (q.v.), originally including almost all the large and varied order Jungermanniaoeae, which agree in bearing solitary sporogonia which usually split into four valves and contain both spores and elaters. It is now restricted to those leafy forms which are suecubous, i.e. in which the front edge of each leaf is beneath the back edge of the succeeding leaf, and have a free and olettperigyne, or membranous envelope round each arehegonium.