The Collaborative International Dictionary of English v.0.48:

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]