Schematic transect of the shady-mesic geosigmetum of the Monte Pellegrino road system (via Monte Ercta, at the last harpin bend on the slopes above Contrada Allaura, descending toward Mondello, 120 m a.s.l.): 1) chasmo-nitrophilous with Parietaria judaica (Crepido bursifoliae-Parietarietum judaicae ass. nov.); 2) cemicryptophytic-camaephytic, sciaphilous vegetation on old walls with Hypochaeris laevigata (Helichryso panormitanae-Hypochaeridetum laevigatae ass. nov.); 3) nitrophilous maquis of old walls (Rhamnus alaternus and Pistacia terebinthus groupment); 4) secondary maquis of detritic slopes (Teucrio flavi-Rhoetum coriariae Gianguzzi ass. nov.); 5) artificial forest plantation with Eucalyptus camaldulensis; 6) artificial forest plantation with Pinus halepensis.