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
　 　
Family:
　		 Lamiaceae /
Shisoka


　

Species in the genus Mentha:

Mentha arvensis / Hakka
Mentha x piperita / Koshouhakka
　
　 　

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

　

　

inserted by FC2 system