(First upload on November 19 2015. Last on December 22 2022) [ 日本語 | English ]

Cirsium arvense (L.) Scop.

Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Cirsium Mill. (アザミ)
Seiyoutoge-azami (セイヨウトゲネアザミ, 西洋棘薊), Canada thistle (USDA), or creeping thistle
Life form: tall perennial forb
Distribution: native to Europe (north to Kinki District in Japan)

Hokkaido Blue List: A3

Habitat: roadsides and grasslands

HUSTEP, introduction to Environmental Earth Science

Stem: hair
Reproduction: seed and vegetative

Breea arvensis (L.) Less.

var. integrifolium Wimm. et Grabowski (エゾノキツネアザミ), applied in China → C. setosum (Willd.) M.Bieb.
f. albiflorum (Redf.) R. Hoffm. (シロバナセイヨウトゲアザミ)

Cirsium arvense in Hokkaido

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[1/2] at a southern part of the Graduate School of Health Sciences of Hokkaido University on August 25 2022. [3-5] at Sakushu-Kotoni River (サクシュコトニ川) near Japanese archery training hall, Hokkaido University. [1-3] on August 22 2015. [4/5] on August 7 2018. [6-9] in a clear-cut open land along O-sawa Course in Nopporo Forest Park on July 17 2021.