The authors studied the vegetation dynamics of Sphagnum dominated mires in the Beregi- sík plain (North-East Hungary). The Braun-Blanquet (1964) method was applied. During their work they described a new type of floating mire. The authors suggest the name skirt-mire after its shape and they present it here. This widespread scraw formation process is observable on flooded willow mires, when willow trunks and branches grow long, bushy hair-like additional roots close to the water surface. In the water the abundant small floating dead plant debris felt with the hairy-like willow roots, with each other and with the plants of the bottom. The succession was very fast on its surface.