Habitat:
Drainage ditch that was modified a few years previously and left as bare soil. In open active pasture. Typha angustifolia, Ambrosia artemisiifolia, Lycopus americanus, Polygonum sagittatum, Epilobium ciliatum, Lobelia siphilitica, Bidens frondosa, Conyza canadensis, Polygonum punctatum, Echinochloa crusgalli, Cyperus rivularis, Cyperus strigosus, Juncus dudleyi, two other Juncus spp., Scirpus atrovirens.