(First upload on July 28 2010. Last on January 6 2015) [ 日本語 | English ]

Erysimum cheiranthoides L.

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

Erysimum L. (エゾスズシロ)
Ezosuzushiro (エゾスズシロ, 蝦夷清白), wormseed wallflower
Life form: annual/biennila forb
Distribution: widespead in the Northern Hemisphere (extotic to Japan *)

*: probably native to northern and western Hokkaido (Umezawa 2007)

Habitat: wet to moist; disturbed sites

Field training on integrated environmental research (統合環境調査法実習) (fauna and flora 種リスト)


Erysimum cheiranthoides L. var. japonicum H. Boissieu
Erysimum japonicum (H. Boissieu) Makino
Erysimum macilentum Bunge

Varieties (Hultén 1968)

ssp. cheiranthoides: annual, lacking thick root; stem simple or branched in middle part, with about 5 basal internodes and 5-10 nodes (introduced weed to AK from Europe)

ssp. altum Ahti: biennial, with thick root; stem not branchedd in middle part, with 8-20 basal internodes and 20-40 nodes (native to AK)


Erysimum cheiranthoides in the Northern Hemishpere



ssp. cheiranthoides: [1/2] at a riverside on Satsunai River, eastern Hokkaido, on June 26 2013. [3] in front of the main door of GSEES on August 21 2010. [4] in front of the main door of GSEES on July 5 2011. [5/6] at a roadside, N14/W4, North Ward, Sapporo, on September 9 2013. [7] in front of Saburen House, Toyotomi Town, northern Hokkaido, on July 23 2014. Records: at a park in East Ward, Sapporo, on July 3 2010. Flowering at a small flower garden in front of a building in N13/E2, East Ward, Sapporo, on June 5 2021.

North America

ST8 ST9 ST10
[8/9] ssp. altum along a paved road at Nome in Seward Peninsula, Alaska, on August 6 2013. [10] along a paved road near a harbor in Saint John, New Brunswick, eastern Canada, on September 19 2014.