Betonica macrantha, formerly Stachys macrantha, known as big betony, is a species of flowering plant in the mint family Lamiaceae.

It is native to the Caucasus, northeastern Turkey, and northwestern Iran.

Spikes of hooded purplish-pink flowers are borne throughout summer.

[3] The Latin specific epithet macrantha means "large-flowered".

[4] The cultivars 'Robusta', 'Superba', and 'Violacea' have gained the Royal Horticultural Society's Award of Garden Merit.