Hymenophyton is a genus of the order Metzgeriales

Metzgeriales

Metzgeriales is an order of liverworts. The group is sometimes called the simple thalloid liverworts: "thalloid" because the members lack structures resembling stems or leaves, and "simple" because their tissues are thin and relatively undifferentiated. All species in the order have a small...

 (liverworts) containing one to three species. The genus has been described as monotypic, with all members possessing a close morphological resemblance, but phytochemical and molecular evidence supports an infrageneric classification two separate species. The name Hymenophyton leptopodum, regarded as a synonym of Hymenophyton flabellatum

Hymenophyton flabellatum

Hymenophyton flabellatum is a species of the order Metzgeriales , one of perhaps several species in the genus Hymenophyton....

, has been resurrected. A population found in Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

 is regarded as a separate clade, and the reinstatement of Hymenophyton pedicellatum has been proposed.