Absinth wormwood
Artemisia absinthium
Black henbane
Hyoscyamus niger
Bull thistle
Cirsium vulgare (Savi) Tenore
Canada thistle
Cirsium arvense
Cypress spurge
Euphorbia cyparissias
Diffuse knapweed
Centaurea diffusa
Houndstongue
Cynoglossum officinale
Musk thistle
Carduus nutans
Myrtle spurge
Euphorbia myrsinites
Oxeye daisy
Chrysanthemum leucanthemum
Perennial pepperweed
Lepedium latifolium
Plumeless thistle
Carduus acanthoides
Scotch thistle
Onopordum acanthium and O. tauricum
Spotted knapweed
Centaurea maculosa
Yellow toadflax
Linaria vulgaris Mill.
