What is "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.