From The Collaborative International Dictionary of English v.0.48 [gcide]:
Jungermannia \Jun`ger*man"ni*a\, prop. n.; pl.
{Jungermanni[ae]}. [NL. Named after Ludwig Jungermann, a
German botanist.] (Bot.)
A genus of hepatic mosses, now much circumscribed, but
formerly comprising most plants of the family, which is
sometimes therefore called {Jungermanniace[ae]}.
[1913 Webster]