Stinging Nettles, Common Nettle, Urtica dioica, East Blean Woodlands, Kent UK, Kent Wildlife Trust, herbaceous perennial flowering plant, plant has many hollow stinging hairs called trichomes on its leaves and stems, which act like hypodermic needles, injecting histamine and other chemicals that produce a stinging sensation when contacted by humans and other animals, butterfly foodplant, peacock, red admiral, small tortoiseshell, comma, butterflies