text: cynodon dactylon, portulaca oleracea, tribulus terrestris, amaranthus retroflexus, chenopodium album, digitaria sanguinalis, eragrostis barrelieri, erigeron sumatrensis, amaranthus albus, amaranthus blitoides, calendula arvensis, chondrilla juncea, convolvulus arvensis, heliotropium europaeum, lobularia maritima, rumex bucephalophorus, tragus racemosus