text: hordeum murinum, cynodon dactylon, plantago lagopus, avena barbata, avena sterilis, bromus madritensis, centaurea aspera, lobularia maritima, piptatherum miliaceum, verbena officinalis, echium creticum, helminthotheca echioides, malva multiflora, sonchus tenerrimus, sorghum halepense, symphyotrichum squamatum, torilis arvensis