persicaria hydropiper, poa annua, poa trivialis, glyceria fluitans, gnaphalium uliginosum, lythrum salicaria, matricaria discoidea, persicaria amphibia, ranunculus sceleratus, stellaria alsine, glechoma hederacea, lolium perenne, mentha aquatica, plantago major, polygonum aviculare, ranunculus repens, sagina procumbens, trifolium repens, veronica beccabunga