fr, pas-de-calais, hedera helix, lonicera periclymenum, fagus sylvatica, quercus robur, carpinus betulus, fraxinus excelsior, betula pubescens, pteridium aquilinum, corylus avellana, euphorbia amygdaloides, hyacinthoides non-scripta, crataegus monogyna, ilex aquifolium, carex sylvatica, arum maculatum, rosa arvensis, quercus petraea, acer campestre, anemone nemorosa, dryopteris filix-mas, teucrium scorodonia, viola reichenbachiana, betula pendula, torminalis glaberrima, deschampsia flexuosa, ligustrum vulgare, circaea lutetiana, avenella flexuosa, polygonatum multiflorum, dryopteris carthusiana, brachypodium sylvaticum, lamium galeobdolon, melica uniflora, holcus mollis, mercurialis perennis, prunus avium, carex pilulifera, milium effusum, cornus sanguinea, castanea sativa, athyrium filix-femina, ajuga reptans, fragaria vesca, deschampsia cespitosa, viola riviniana, crataegus laevigata, carex flacca, euonymus europaeus, prunus spinosa, populus tremula