Rare and endangered vegetation and vascular plants in canyon “Gorodskaya shchel’ (Town Crack)” in southern part of Khibiny Mountains (Murmansk Region, Russia)Rare and endangered vegetation and vascular plants in canyon “Gorodskaya shchel’ (Town Crack)” in southern part of Khibiny Mountains (Murmansk Region, Russia) Rare and endangered habitat types and vascular plant species were studied in the canyon associated with slope cirque “Gorodskaya shchel’ (Town Crack)” in the southern part of Khibiny Mountains (Murmansk Region). Habitat types are interpreted based on a phytosociological approach (Braun-Blanquet classification). Habitat type “D4.2. Basic mountain flushes and streamsides, with a rich arctic-montane flora” of the Emerald Network (partly coincides with type 3220 “Alpine rivers and the herbaceous vegetation along their banks” of Council Directive 92/43/EEC) includes two associations: Mniobryo–Epilobietum hornemannii Nordhagen 1943 of alliance Mniobryo–Epilobion hornemannii Nordhagen 1943, сlass Montio–Cardaminetea Br.-Bl. et Tx. ex Klika et Hada |