text: solanum nigrum, argentina anserina, atriplex patula, echinochloa crus-galli, elymus repens, lamium purpureum, persicaria amphibia, persicaria maculosa, poa annua, urtica urens, chenopodium album, cirsium arvense, poa trivialis, rumex obtusifolius, galinsoga quadriradiata, matricaria discoidea, stellaria media