Photo: Cirsium arvense 2.

Closeup of flower. Rekola, Vantaa, Finland. Wild. 1992-07-01.

Cirsium arvense (L.) Scop.
Engl.: Canada thistle, Canadian thistle, California thistle, creeping thistle, cursed thistle, field thistle.
Deu.: Acker-Kratzdistel, Ackerdistel.
Suom.: pelto-ohdake.
Sven.: åkertistel.
Fran.: chardon des champs, chardon, chardon commun, chardon des prés, chardon du Canada, chardron, chaudron, cirse des champs, minou.
Bot. syn.: Breea arvensis (L.) Less, Carduus arvensis (L.) Robson, Cephalonoplos ochrolepideum (Juz.) Juz., Cephalonoplos setosus (Ledeb.) Kitamura, Cephanolonoplos arvensis (L.) Fourr., Cirsium incanum (Gmel.) Fisch., Cirsium ochrolepideum Juz., Cirsium setosum (Willd.) Bess. ex Bieb., Cnicus arvensis (L.) Hoffm., Cnicus arvensis (L.) Roth, Serratula arvensis L.