Urtica dioica subsp. galeopsifolia, the fen nettle or stingless nettle, is a herbaceous perennial plant found in Europe. It is considered to be either a subspecies of stinging nettle (Urtica dioica), or a species in its own right: Urtica galeopsifolia. Unlike most other nettles, fen nettle has no stinging hairs or very few, instead being covered in fine, dense, non-stinging hairs. It has long, narrow leaves, these being reminiscent of the unrelated hemp nettles, Galeopsis. Fen nettle grows up to 2 metres (7 ft) tall.