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(First upload on November 3 2013. Last on October 21 2023) [ 日本語 | English ]

Rumex L. (スイバ) Nagabagishigishi (ナガバギシギシ, 長葉羊蹄), curly dock, or yellow dock Chizimisuiba (チヂミスイバ) Lifeform: perennial forb (dioecism) ≈ 1.5 m in height Distribution: native to Europe and Western Asia (exotic to Japan and now widespread) Japan: introduced in Meiji Era (firstly reported from Tokyo in 1891) Hokkaido Blue List: category A3 → weed (雑草)

Habitat: disturbed sites, such as roadsides, sunny arable lands and sunny grasslands Leaf margin: waved or curled well Chromosome number: 2n = 60 (♀) Synonyms (discarded): Rumex crispus L. ssp. fauriei (Rech. f.) Mosyakin et W. L. Wagner Hybrids: between R. crispus and R. japonicaus ⇒ confusing in the fields

Rumex crispus in Asia

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Japan

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[1/2] along Toshibetsu River (利別川) near the Ashoro Experimental Forest of Kyushu University, eastern Hokkaido, on June 25 2013. [3/4] near the mouth of Mukawa River, central Hokkaido, on June 29 2022. [5] in Oi Pier Seaside Park, Tokyo, on December 26 2015. [6] along a seacoast on the bottom of cliff near the Muroran Marine Experimental Station of Hokkaido University on September 11 2017. [7/8] at Road Station Iwanai, central Hokkaido, after investigating an area planned for Shimamaki Wind Farm, on June 19 2023.

Northeast China

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[1-3] in the campus of Northeast Normal University in Changchun, northeastern China, on June 5 2017.