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(Upload on October 30 2016) [ 日本語 | English ]

Phragmites Adans. (ヨシ) Tsuruyoshi (ツルヨシ, 蔓葦), Japanese reed (* tentative) Lifeform: perennial grass, producing aboveground stoloniferous shoots only Distribution: Ryukyu Islands - Japan - Korea - Russian Far East Habitat: sandy, wet sites, including streamsides

Flower: after August Leaf: 10-30 cm long and 2-3 cm wide, sometimes becoming red at the top Synonyms: Phragmites prostratus Makino

Phragmites japonicus on Mount Usu

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[1-3] in the Nishiyama Craters on Mount Usu (有珠山) on September 13 2016. Records: on a bank, made of concrete, near Kariki Bridge along Toyohira River, Sapporo, on June 21 2021.