text: eragrostis minor, ceratodon purpureus, digitaria ischaemum, medicago lupulina, poa annua, arenaria serpyllifolia, bryum argenteum, capsella bursa-pastoris, cerastium holosteoides, clinopodium acinos, erigeron canadensis, persicaria maculosa, spergularia rubra, chenopodium album, matricaria discoidea, viola arvensis