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

Phragmites japonicus Steudel

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

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

Phragmites prostratus Makino


Phragmites japonicus on Mount Usu

Phragmies1 Phragmies2 Phragmies3
[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.