Phanérogames (données E. Bisteau, 2002 - petite pelouse 'Deflandre'): Achillea millefolium, Agrimonia eupatoria, Allium oleraceum, Anthyllis vulneraria, Arrhenatherum elatius, Arum maculatum, Avenula pubescens, Bellis perennis, Brachypodium pinnatum, Briza media, Bromus erectus, Bupleurum falcatum, Campanula rotundifolia, Carex caryophyllea, Carex flacca, Carex humilis, Centaurea jacea sensu lato, Centaurea scabiosa, Chaerophyllum temulum, Cirsium acaule, Cirsium arvense, Dactylis glomerata, Daucus carota, Epipactis atrorubens, Euphorbia cyparissias, Euphrasia nemorosa, Festuca lemanii, Festuca rubra, Fragaria sp., Galium aparine, Galium mollugo, Galium pumilum, Galium verum, Genista tinctoria, Gentianella germanica, Gymnadenia conopsea, Helianthemum nummularium, Helleborus foetidus, Heracleum sphondylium, Hieracium pilosella, Hypericum hirsutum, Hypericum perforatum, Inula conyzae, Knautia arvensis, Lapsana communis, Leontodon hispidus, Leucanthemum vulgare, Linaria vulgaris, Linum catharticum, Lotus corniculatus, Medicago lupulina, Narcissus pseudonarcissus, Ononis repens, Phleum pratense, Pimpinella saxifraga, Plantago lanceolata, Platanthera chlorantha, Poa compressa, Poa trivialis, Polygonatum odoratum, Potentilla neumanniana, Potentilla reptans, Primula veris, Prunella laciniata, Ranunculus bulbosus, Sanguisorba minor, Scabiosa columbaria, Senecio jacobaea, Senecio vulgaris, Sesleria caerulea, Sherardia arvensis, Solanum dulcamara, Sonchus asper, Stachys alpina, Taraxacum sp., Teucrium chamaedrys, Thlaspi perfoliatum, Thymus pulegioides, Torilis japonica, Tragopogon pratensis, Trifolium medium, Trifolium montanum, Trisetum flavescens, Valerianella dentata, Verbascum thapsus, Vicia cracca, Viola hirta.