Umbilicus horizontalis
Specie abbondanti e frequenti
- 30.1.1 All. Asplenion glandulosi Br.-Bl. & Meier in Meier & Br.-Bl. 1934
- 30.4.1 All. Phagnalo saxatilis-Cheilanthion maderensis Loisel 1970 corr. F.J. Pérez, T.E. Díaz, P. Fernández & Salvo 1989
- 31.1.3 All. Brassicion oleraceae Rivas-Martínez, Fernández-González & Loidi 1999