xanthium strumarium, glechoma hederacea, ambrosia artemisiifolia, elymus repens, juncus tenuis, carex hirta, carex praecox, chenopodium album, convolvulus arvensis, poa pratensis, trifolium repens, bidens tripartita, erigeron annuus, erigeron canadensis, medicago lupulina, plantago lanceolata, polygonum aviculare