(First upload on March 1 2010. Last on January 1 2019) [ 日本語 | English ]

Artemisia montana (Nakai) Pamp.

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

Artemisia L. (ヨモギ)
Oyomogi (オオヨモギ, 大蓬), mountain mugwort, Ezoyomogi (エゾヨモギ, 蝦夷蓬), Yamayomogi (ヤマヨモギ, 山蓬)
Lifeform: perennial forb < 2 m in height
Distribution: temperate Asia (Russian Far East - China - Korea - Japan)
  • 北村四郎. 1954. ハイイロヨモギ本州に自生. 植物分類・地理 15: 148
Habitat: grasslands (e.g., on skislopes)

flora on Mount Usu

Head: < 3 mm in diameter
Seed dispersal: wind
Chromosome number: 2n = 52
Pollen allergy (花粉症): mostly reported from Hakodate

chlorophyll = anti-acne by antimicrobial activity, flavonoid = antioxidant effect → synergetic effect on removing aging-caused radical oxygen, preventing saccharization (saccharization: collagens, elastins and sugars hardened by adhesive bonding → lost the elasticity of skin


Artemisia vulgaris L. var. indica (Wall.) Maxim f. montana Nakai


Artemisia montana in Hokkaido

[1/2] at a forest edge in Keiteki-no-mori Forest (恵迪の森), Hokkaido University Campus, on October 13 2010. [3/4] at a roadside, N11/W1, North Ward, Sapporo, on September 10 2013.
late fall5 late fall6 late fall7
late fall8
[5] at the Oshoro Stone Circle (忍路環状列跡) on November 2 2013. [6] at a riverside for field training on integrated environmetns near Usujiri, southern Hokkaido, on June 16 2015. [7] along a street faced to N25/W2, North Ward, Sapporo, on August 31 2018. [8] along a paved road in N26/E2, East Ward, Sapporo, on September 5 2019. Records: in front of the Muroran Marine Experimental Station of Hokkaido University on September 9 201.