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(First upload on March 9 2024. Last on November 27 2025) [ 日本語 | English ]

Bolboschoenus (Asch.) Palla (ウキヤガラ) Ko-ukiyagara (コウキヤガラ, 小浮矢柄), sea clubrush, cosmopolitan bulrush, alkali bulrush, saltmarsh bulrush and bayonet grass Ezo-ukiyagara (エゾウキヤガラ, 蝦夷浮矢柄) Lifeform: rhizomatous, perennial sedge Distribution: Eurasia, including Japan Habitat: salt marsh, channel, shallow water on river mouth, etc. Chromosome number: 2n = 50

Synonyms: Scirpus maritimus, auct. non L. Scirpus compactus, auct. non Hoffm. Scirpus biconcavus Ohwi Bolboschoenus planiculmis, auct. non (F. Schmidt) T. V. Egorova, often used Bolboschoenus maritimus, auct. non (L.) Palla, formerly used Scirpus planiculmis, auct. non F. Schmidt Bolboschoenus biconcavus (Ohwi) Horiuchi

Bolboschoenus koshevnikovii in Hokkaido

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1 2 3 4
5 6 7
[1/2] in the wetland at the former site of the canceled Atsuma wind power project on August 4 2025. [3-7] in a post-mined peatland, Sarobetsu mire, northern Hokkaido. [3/4] on June 6 2005, collected by N and K. [5-7] on May 22 2025.