text: hordeum murinum, avena barbata, convolvulus arvensis, cynosurus echinatus, poa annua, trifolium repens, bromus madritensis, bromus rigidus, bromus sterilis, cynodon dactylon, lepidium virginicum, lolium perenne, malva sylvestris, plantago major, rumex pulcher, sagina procumbens, sisymbrium officinale, sonchus oleraceus, verbena officinalis