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Kivonat:

The authors have began examinating the bryophyte flora of the areas consisting of radiolarite bedrock in the Bükk mountains. This bedrock type provides a rather acidic substrate as big cliffs or as rubble because its Si content is near 100%, so a quite different bryophyte vegetation can develop on it than on the limestone areas. Polytrichetum piliferi bryophyte associations can be found rubble-soil areas, and we found Paraleucobryetum fulvi, Hypno-Polypodietum and Bartramietum pomiformis associations on the shady radiolarite cliffs. In the beech forest zone of the mountains Leucobryum glaucum occurs in big cover (Pazsag, Vasbánya-lápa).Three rare or new species have been found for the Bükk mountains: Porella platyphylloidea which occured on the huge radiolarit cliff of Nagyoldal, Jungermannia sphaerocarpa which is a new data of this species for the Bükk mountains and it was collected at Pazsag valley on Borostyán-hill. The third species is new for the Hungarian Northern Mountains, it is Myurella julacea var. scabrifolia. We will cont inue this work with exploring new radiolarite areas and examinatig the bryophyte flore of them.