Biantheridion

Biantheridion is a genus of liverwort in the family Anastrophyllaceae.^[3] Its only accepted species is Biantheridion undulifolium^[3] (synonyms including Jamesoniella undulifolia^[2]) the marsh flapwort,^[4] or marsh earwort. It is found in Austria, China, the Czech Republic, Denmark, Finland, France, Germany, Greenland, North Korea, Norway, Poland, Russia, Sweden, Switzerland, and the United Kingdom. Its natural habitat is swamps. It is threatened by habitat loss.

Biantheridion
Conservation status
Vulnerable  (IUCN 2.3)[1]
Scientific classification
Kingdom:	Plantae
Division:	Marchantiophyta
Class:	Jungermanniopsida
Order:	Lophoziales
Family:	Anastrophyllaceae
Genus:	Biantheridion
Species:	B. undulifolium
Binomial name
Biantheridion undulifolium (Nees) Konstant. & Vilnet
Synonyms[2]
Aplozia autumnalis var. undulifolia (Nees) Boulay Crossogyna undulifolia (Nees) Schljakov Jamesoniella autumnalis var. undulifolia (Nees) Meyl. Jamesoniella schraderi var. undulifolia (Nees) C.E.O.Jensen Jamesoniella undulifolia (Nees) Müll.Frib. Jungermannia schraderi f. undulifolia Nees Jungermannia schraderi var. undulifolia (Nees) Gottsche, Lindenb. & Nees