Description: A common herbaceous creeping perennial of woodland growing up to about 3 ft (90 cm), with a unique and rather unpleasant smell when crushed. The dark purple flowers are borne in long terminal spikes.

This species differs from Stachys palustris in habitat preference, the broader leaves and the characteristic smell, but the two can hybridise where they meet. Records of this hybrid are rare in Northern Ireland.

All names: Stachys sylvatica L.

Distribution Map from NBN: Stachys sylvatica at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Stachys sylvatica at iNaturalist World Species Observations database.