quercus rubra, avenella flexuosa, pleurozium schreberi, rhytidiadelphus squarrosus, kindbergia praelonga, robinia pseudoacacia, acer pseudoplatanus, betula pendula, castanea sativa, dicranella heteromalla, frangula alnus, hypnum cupressiforme, prunus serotina, pseudoscleropodium purum, quercus robur