Liparis loeselii, common names fen orchid, yellow widelip orchid, or bog twayblade, is a species of orchid. It is native to Europe, northern Asia, the eastern United States and eastern Canada. It grows in fens, bogs and dune slacks. It is a yellow flowering plant with glossy yellow-green leaves. Subspecies 1. \n* Liparis loeselii subsp. loeselii - Europe, Russia, Kazakhstan, Canada, United States 2. \n* Liparis loeselii subsp. orientalis Efimov - Altay region of Russia 3. \n* Liparis loeselii subsp. sachalinensis (Nakai) Efimov - Sakhalin Island in Russia