ceratodon purpureus, digitaria sanguinalis, eragrostis minor, arenaria serpyllifolia, medicago lupulina, oxalis corniculata, pinus mugo, brachythecium albicans, bryum argenteum, chenopodium album, oxalis stricta, poa annua, polygonum aviculare, scleranthus annuus, senecio vulgaris, setaria viridis, acer negundo, solidago canadensis, spergularia rubra, stellaria media, veronica arvensis