medicago lupulina, arenaria serpyllifolia, lepidium ruderale, matricaria discoidea, cirsium arvense, erigeron canadensis, plantago major, poa annua, lolium perenne, polygonum aviculare, bromus hordeaceus, capsella bursa-pastoris, malva pusilla, trifolium repens, dactylis glomerata, papaver rhoeas