quercus rubra, betula pendula, pinus sylvestris, castanea sativa, polytrichum formosum, frangula alnus, quercus robur, dicranum scoparium, avenella flexuosa, carex pilulifera, larix decidua, populus tremula, potentilla erecta, salix caprea, vaccinium myrtillus, betula pubescens, robinia pseudoacacia