Amethystea is a genus of plants in the family Lamiaceae, first described for modern science by Linnaeus in 1753.

It has only one known species, Amethystea caerulea, commonly known as blue amethystea.

[2] It is native to China, Japan, Korea, Central Asia (Tibet, Xinjiang, Kazakhstan, Tajikistan, Kyrgyzstan), and parts of Russia (Altai, Chita, Irkutsk, Buryatiya, Primorye).

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