fr, pas-de-calais, arenaria serpyllifolia, plantago lanceolata, achillea millefolium, dactylis glomerata, hypericum perforatum, erodium cicutarium, medicago lupulina, sedum acre, draba verna, echium vulgare, eryngium campestre, pilosella officinarum, veronica arvensis, poterium sanguisorba, daucus carota, convolvulus arvensis, reseda lutea, euphorbia cyparissias, arrhenatherum elatius, saxifraga tridactylites, vicia sativa, trifolium campestre, bromus hordeaceus, cerastium semidecandrum, papaver rhoeas, festuca rubra, senecio vulgaris, bromus sterilis, picris hieracioides, diplotaxis tenuifolia, artemisia vulgaris, trifolium arvense, jacobaea vulgaris, lotus corniculatus, lysimachia arvensis, vicia hirsuta, ononis spinosa, poa pratensis, sedum album, galium verum, hypochaeris radicata, reseda luteola, centaurea scabiosa, erigeron canadensis, petrorhagia prolifera, rumex acetosella, potentilla verna, agrostis capillaris, festuca ovina, origanum vulgare