Hybridises with : Marsh Woundwort (Stachys palustris) to produce Hybrid Woundwort (Stachys × ambigua)

Some similarities to : Red Hemp-nettle.

Distinguishing Feature : dark beetroot coloured flowers with white blotches. Unpleasant mousy smell.

When any part of this plant is crushed a smell un-pleasant to most but a few individuals is unleashed. The upper leaves are narrow and a darker green than the lower heart-shaped leaves. The flowers are a dark beetroot shade of purple with white blotches and are covered in tiny bristle-like bracts.

It yields a yellow dye.

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