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(First upload on June 6 2009. Last on July 8 2022) [ 日本語 | English ]

Urtica platyphylla Wedd.






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

Urtica L. (イラクサ)
Ezo-irakusa (エゾイラクサ, 蝦夷刺草)
Lifeform: perennial forb, with 50-80 cm tall
Distribution: China- Japan
Habitat: woodlands - forests

Field training on integrated environmental research (統合環境調査法実習) (fauna and flora 種リスト)
HUSTEP: Plants and Plant communities in Japan (flora list)

Stem: dense, short hair
Poison: leaves and stems have stinging hairs, causing irritation to skin
索引

Urtica platyphylla in Hokkaido


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[1-4] at Keiteki-no-Mori forest (恵迪の森) in the campus of Hokkaido University. [1] a grassland completely dominated by this species on May 15 2014, after a huge gap was developed by Typhoon 18 in 2004. [2/3] on July 23 2009. Just flowering. Do not touch! [4] at a forest edge near Akkeshi Marine Experimental Station, eastern Hokkaido, on July 1 2014. [5/6] near a transplanted forest of Fraxinus mandshurica in the Experimental Forest of the University of Tokyo, Furano, central Hokkaido, on June 28 2017. (6, see the diverse leaf shapes.) [7-9] along the Horonai River in the ToEF-HU on June 29 2022. Records: along the Horonai River on June 27 2023.

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