Fen Orchis, also known as Liparis loeselii, is a species of terrestrial orchid found in wetlands and swamps. This plant is known for its yellow-green flowers arranged in a spike and its unique lip that looks like a pouch. Some synonyms for Fen Orchis include Loesel's Twayblade, Loesel's Liparis, and Fen Bog-orchid. These plant names are derived from the orchid's scientific name and the habitat where it can be found. The Loesel's Twayblade is named after Johann Georg Christian Loesel, a German botanist who first discovered this orchid. Regardless of the name used to refer to this plant, Fen Orchis remains an intriguing and fascinating member of the botanical world.