Wild plants in and around Shimane 島根とその周辺の野生植物


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Mentha arvensis / Hakka ハッカ

Bloom time: August-October

Lamiaceae /


Species in the genus Mentha:

Mentha arvensis / Hakka
Mentha x piperita / Koshouhakka

Mentha_suaveolens / Marubahakka

Mentha arvensis / Hakka ハッカ


Mentha arvensis, a 20-60cm tall perennial herb found in somewhat damp places, extends many long rhizomes to propagate, with vellus hairs on stems, leaves, and calyxes. The leaves are opposite, 2-8cm long, 1-2.5cm wide, in a long oblong shape, with pointed tips, margins sharply serrated, and backsides with glandular spots. Axils on the upper parts put 4-5mm long whorls, light purple flowers. Calyxes cut themselves in five, and the segments pointed. Bloom time: August-October.





inserted by FC2 system