(First upload on July 22 2003. Last on January 21 2015) [ 日本語 | English ]

Petasites japonicus (Sieb. et Zucc.) Maxim.

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

Petasites Mill. (フキ)
P. japonicus (Sieb. et Zucc.) Maxim.
Fuki (フキ, 蕗)
Lifeform: perennial forb
Distribution: Japan (south to Tohoku), Korea, Russian Far East, China
Habitat: mesic sites
var. giganteus (Fr. Schm.) Hort. ex Nichols
Oobuki (オオブキ, 大蕗), giant sweet coltsfoot
Akitabuki (アキタブキ, 秋田蕗)
Distribution: Japan (north to Tohoku), Sakhalin, southern and central Kurile
Shoot: extremely large, often becoming 2 m tall and 1.5 m wide
Nomen number: 105034
Place of publication: Ill. dict. gard. century suppl. 591. 1900

Petasites japonicus Maxim. = Nordosmia japonica Sieb. et Zucc.
Petasites japonicus (Sieb. et Zucc.) Maxim. ssp. giganteus (Fr. Schm. ex Trautv.) Kitam. =
Petasites amplus Kitam. (Acta Phytotax. Geobot. 1932, p. 115)
Petasites liukiuensis Kitam. (Acta Phytotax. Geobot. 1933, p. 178)


Petasites japonicus in Japan

841 842 843
[1/2] at Hibiya Park, Tokyo, on December 27 2014. [3] in the Shimizudani Park, close to Sophia University, on October 19 2018.

var. giganteus

841 842 883
884 145 146
[1-4] Mount Usu. [1/2] in late April 1984 when I was in Master's course. [3/4] this individual attaches deformed vegetative leaves on reproductive stalks on April 29 1988. [5/6] at a boardwalk near Sarobetsu Wetland Center, northern Hokkaoido, on May 21 2014.