(Upload on November 3 2015) [ 日本語 | English ]

Mentha canadensis L.

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

Mentha L. (ハッカ, mint)
M. canadensis L.
Hakka (ハッカ, 薄荷, s.l.), American wild mint
Lifeform: perennial forb
Habitat: on mosit soil, escaped from crop fields
Chromosome number: 2n = 96
Use: oil, menthol (many cultivars)

Mentha haplocalyx Briq. var. nipponensis
Mentha haplocalyx Briq.
Mentha sachalinensis (Briq.) Kudo

Mentha arvensis L. var. piperascens Malinv. ex Holmes
Mentha arvensis L. var. formosana Kitam.
Mentha arvensis L. ssp. piperascens (Malinv. ex Holmes) H. Hara
Mentha haplocalyx Briq. var. piperascens (Malinv. ex Holmes) C. Y. Wu et H. W. Li

var. piperascens (Malinv. ex Holmes) H. Hara
Hakka (ハッカ, 薄荷, s.s.), or Nihon-hakka (ニホンハッカ, 日本薄荷), Japanese peppermint
Distribution: China - Korea - Japan, including Hokkaido

Mentha canadensis in Hokkaido

[1-4] along a road to go the Toya Lake Experimental Station of Hokkaido University faced to Toya Lake on September 15 2015