artemisia vulgaris, diplotaxis muralis, syringa vulgaris, amblystegium serpens, asplenium ruta-muraria, ballota nigra, capsella bursa-pastoris, chelidonium majus, erigeron canadensis, homalothecium sericeum, medicago lupulina, pimpinella saxifraga, silene vulgaris, tortula muralis, lactuca serriola