Biantheridion undulifolium (Nees) Konstant. & Vilnet (per.)

– 9: sedge- Sphagnum bog at the bottom of quartzite ridge [121187], mixed with Polytrichum strictum or Schistochilopsis incisa, Lophozia wenzelii, Scapania parvifolia, Cephaloziella arctogena . The species was previously known in the Urals from one locality in Polar Urals (Konstantinova & Chernyadjeva, 1995) and one site on Mt. Ner-Oika (Konstantinova & Lapshina, 2014). It is a world wide rare species that has status “disappeared” in Central and Western Europe (Schumacker & Matriny, 1995) and listed as rare in the Red Data Book of Russia (Bardunov, 2008). It has recently been found in many sites in Siberia (Konstantinova & Savchenko, 2008).