A synopsis of high-rank syntaxa of scree vegetation with an accompanying list of plant communities is presented. The classification of scree vegetation in only one broadly conceived class, the Thlaspietea rotundifolii, throughout Europe is a new concept. The vegetation on screes was classified into 8 major groups (17 orders and 42 alliances) according to their altitudinal range and the chemistry of the parent material. Brief information on ecological conditions, phytogeographical patterns, and altitudinal distribution are given. The characteristics and important diagnostic taxa for each alliance and order classified within the Thlaspietea rotundifolii are given.
Valachovič, M., Dierssen, K., Dimopoulos, P., Hadač, E., Loidi, J., Mucina, L., … Tomaselli, M. (1997). The vegetation on screes - A synopsis of higher syntaxa in Europe. Folia Geobotanica, 32(2), 173–192. https://doi.org/10.1007/bf02803739