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(First upload on August 27 2016. Last on September 30 2024) [ 日本語 | English ]

Rumex L. (スイバ) nodaiou (ノダイオウ, 野大黄), dooryard dock or northern dock Lifeform: perennial forb (dioecism) ≈ 1 m in height Distribution: widespread in the cool-temperatre regions of the Northern Hemisphere, including Japan (Hokkaido and Honshu) Red Data Book: vulnerable (VU, assigned in 2012) Habitat: sunny and mesic sites, such as ditches, stream sides and grassy marshlands

Leaf: hairless ⇒ Rumex gmelinii (カラフトノダイオウ), hair on the backside

Rumex acetosa in Hokkaido

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4 5 6
[1-3] in and around Takoppe Wetland, Niikappu Town, south-central Hokkaido, on June 13 2016. [4] in a pond along Horonai River in ToEF on June 10 2022. [5/6] in the backyard of the office building for Wakayama Experimental Forest of Hokkaido University, western Japan, on June 25 2024.