sagina apetala, erigeron floribundus, poa annua, bryum argenteum, erigeron canadensis, sagina procumbens, sporobolus indicus, symphyotrichum squamatum, capsella bursa-pastoris, carex arenaria, dichondra micrantha, juncus bufonius, paspalum vaginatum, plantago coronopus, plantago major, polycarpon tetraphyllum, solanum nigrum, sonchus oleraceus