Diagnostic species | Amaranthus albus, Amaranthus retroflexus, Arctium lappa, Arctium minus, Artemisia vulgaris, Atriplex sagittata, Ballota nigra, Bromus sterilis, Bromus tectorum, Carduus acanthoides, Cichorium intybus, Conium maculatum, Conyza canadensis, Echinops sphaerocephalus, Galinsoga parviflora, Hordeum murinum, Iva xanthiifolia, Lactuca serriola, Lolium perenne, Poa palustris, Polygonum aviculare, Sisymbrium loeselii, Sisymbrium officinale, Solidago canadensis, Sonchus oleraceus, Tripleurospermum inodorum (?) |