helosciadium nodiflorum, nasturtium officinale, callitriche stagnalis, catabrosa aquatica, cyperus fuscus, glyceria declinata, polypogon viridis, ranunculus hederaceus, veronica beccabunga, alopecurus aequalis, poa annua, ranunculus repens, sagina sabuletorum, stellaria alsine