Canada thistle
Cirsium arvenseAsteraceae
Flower
Habitat
Habitat
FlowerHabitatHabitat
Photos (c) Cheryl Comeau Beaton unless otherwise noted

Synonyms:

  • Canadian thistle
  • Cirsium incanum, C. setosum, Carduus arvensis, Breea arvensis, B. incana, Serratula arvensis

The Leaves:

  • Leaf lobes are tipped with needle-like thorns.

Dispersal:

  • wind-dispersed seeds

Similar Species:

  • Can be confused with other thistle species.

Notes:

  • The places where it is found on Nantucket are not pristine, but having been disturbed in the past, are now natural.

Growth Form: Herb

Origin: Europe, Asia

Level of Invasiveness for Nantucket: Invasive

Level of Invasiveness for Massachusetts: Not evaluated

Massachusetts Cultivation Restrictions: no




Credits: The Electronic Field Guide to the Invasive Plants of Nantucket (c) 2005-2006 Maria Mitchell Association, EFG Project, UMass Boston