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(First upload on December 8 2009. Last on August 20 2020) [ 日本語 | English ]

Erigeron L. (ムカシヨモギ) Himemukashiyomogi (ヒメムカシヨモギ, 姫昔蓬), Canadian horseweed (ゴイッシングサ, テツドウグサ, メイジソウ) Lifeform: weedy annual-biennial forb < 2 m high Distribution: native to North America (exotic to Japan) Hokkaido Blue List: A3 Habitat: roadsides, fields, and meadows

HUSTEP: Plants and Plant communities in Japan (flora list) flora on Mount Usu Seed dispersal: wind Morphology: E. canadensis vs E. sumatrensis Synonyms: Conyza canadensis (L.) Cronquist var. levis Makino (ケナシヒメムカシヨモギ) (Syn. Conyza canadensis (L.) Cronquist var. pusilla (Nutt.) Cronquist)

Erigeron canadensis in Hokkaido

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[1-3] at a roadside of N23/W2, North Ward, Sapporo, on August 31 2009. [4/5] at a roadside, N22/E3, East Ward, Sapporo, on August 5 2011. [6] at an openland along Ishikari Coast, where a wind power will be established, on September 3 2015. [7] in front of Otsuka ophthalmic clinic, N16/E4, North Ward, Sapporo, on August 12 2020. [8] along a paved road in N21/E2, East Ward, Sapporo, on September 3 2019. in front of the GSEES, Hokkaido University, on September 8 2017.