The meadows, vary in form according to the level of humidity of the soil, each has a characteristic flora.

-One finds in the humid meadows, the most typical form of the champagne wetlands, sedge, aquatic ragwort, grasses, clover etc.

-Chalk fields confined in this sector have escaped cultivation (the south side of the Côte de Champagne). High and dense, they have welcomed milkwort and many species of orchids.

-In the marshes, present in this part of the Champagne wetlands in the Park, especially surrounded by the forest, one can observe rare plants such as the gentian, the perennial sow thistle or the spurge...

-Many ponds are dotted across the Orient massif. They constitute a very interesting and rich environment for hydrophilic and aquatic flora. One distinguishes sedges and reeds, then a belt of immersed plants loddon pondweed and water lilies...