This association includes calcicolous scree vegetation dominated by the grass Melica ciliata, which is accompanied by Teucrium botrys and several thermophilous species of dry grasslands. It has been recorded at a single site in the Czech Republic: a marble scree slope near the village of Horní Dunajovice in south-western Moravia. In the past the open character of this site and scree movement had been probably supported by grazing; now it is threatened by encroachment of bushes and Robinia pseudacacia.