text: ceratodon purpureus, cerastium semidecandrum, saxifraga tridactylites, myosotis stricta, senecio vernalis, viola arvensis, arenaria serpyllifolia, echium vulgare, erigeron canadensis, gemmabryum caespiticium, lactuca serriola, papaver dubium, roemeria argemone, sedum acre, vicia lathyroides, vicia villosa, artemisia vulgaris, crepis tectorum, draba verna, geranium robertianum, oenothera biennis, picris hieracioides, trifolium arvense