(Metzgeria)
Metzgeria is a genus of thalloid liverworts in the family Metzgeriaceae.The genus was named in honor of Johann Metzger (1771-1844), German copper engraver and art restorer from Staufen, Breisgau (Baden-Wurttemberg), a friend of Raddi and pupil of the great Florentine engraver Raphael Sanzio Morghen (1753-1833). Approximately 120 to 200 species of Metzgeria have been described. Species may be either monoicous or dioicous.