(First upload on December 2 2007. Last on February 2 2022) [ 日本語 | English ]

Geum japonicum Thunb.

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

Geum L. (ダイコンソウ)
Daikonsou (ダイコンソウ, 大根草), large-leaf avens
Lifeform: deciduous perennial forb ≈ 30-60 cm in height
Distribution: East Asia - North America
Habitat: woodlands, forest edges, and grasslands
Seed dispersal: exogenous zoochore (animal dispersal)

flora on Mount Usu

Leaf: small stipule ⇔ G. aleppicum = toothed large stipule
Flower: mid-summer
Use: medicine (whole parts)

Geum japonicum in Japan


Geum1 Geum2
Geum3 Geum4 Geum5
[1/2] at the Hokkaido University Campus on June 14 2007. [3/4] at the backyard of Toya Lake Experimental Station on September 13 2016. [5] along Katsura Course in Nopporo Forest Park on July 17 2021.


Geum1 Geum2 Geum3
[1-3] near Kintaro Rock between Togendai and Ubako, Hakone, central Honshu, on August 21 2021.