Mentha arvensis / Hakka

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

Mentha arvensis / Hakka ハッカ
Bloom time: August-October

Family:	Lamiaceae / Shisoka		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, extend 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 whorls of 4-5mm long, light purple flowers. Calyxes cut themselves in five, and the segments pointed. Bloom time: August-October.

▲AUTUMN #7