text: cirsium arvense, poa annua, stellaria media, aphanes arvensis, arabidopsis thaliana, chenopodium album, galium aparine, gnaphalium uliginosum, juncus bufonius, lamium purpureum, matricaria chamomilla, myosotis arvensis, plantago uliginosa, sagina procumbens, vicia hirsuta, viola arvensis, centaurea cyanus, cerastium holosteoides, elymus repens, polygonum aviculare