Creeping Thistle/Canada Thistle (Non Native Invasive Plant Species in Banff National Park)

Creeping Thistle/Canada Thistle

Cirsium arvense

Summary ⁶

Cirsium arvense is a perennial species of flowering plant in the family Asteraceae, native throughout Europe and northern Asia, and widely introduced elsewhere. The standard English name in its native area is creeping thistle.

https://www.natureconservancy.ca/en/what-we-do/resource-centre/invasive-species/canada-thistle.html

How to recognize it? ⁷

Smooth stem. Irregular, wavy non-hairy leaves with spiny edges. Small (<1in) lavender flowers with sweet scent.

Native lookalike: Hookers Thistle

Observations in Banff National Park ⁸

2020-21: https://inaturalist.ca/observations?project_id=69401&taxon_id=60132&place_id=any&verifiable=any
2019-20: https://inaturalist.ca/observations?project_id=38602&taxon_id=60132&place_id=any&verifiable=any

Sources and Credits

(c) Almantas Kulbis, some rights reserved (CC BY-NC), uploaded by Almantas Kulbis
(c) David Rasp, some rights reserved (CC BY), http://commons.wikimedia.org/wiki/File:20200701Cirsium_arvense3.jpg
(c) Danny S., some rights reserved (CC BY-SA), http://commons.wikimedia.org/wiki/File:Cirsium_arvense-039.jpg
(c) Donald Hobern, some rights reserved (CC BY), http://commons.wikimedia.org/wiki/File:Cirsium_arvense_(19531824473).jpg
(c) Matt Lavin, some rights reserved (CC BY-SA), http://commons.wikimedia.org/wiki/File:Cirsium_arvense_(5002124956).jpg
Adapted by bioblitzbanff from a work by (c) Wikipedia, some rights reserved (CC BY-SA), https://en.wikipedia.org/wiki/Cirsium_arvense
Adapted by metallyza from a work by (c) bioblitzbanff, some rights reserved (CC BY-SA)
(c) metallyza, some rights reserved (CC BY-SA)

More Info

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Creeping Thistle/Canada Thistle

Summary 6

How to recognize it? 7

Observations in Banff National Park 8