Stinging nettle (Urtica dioica)

Urtica dioica

Summary 2

Urtica dioica, often called common nettle or stinging nettle (although not all plants of this species sting), is a herbaceous perennial flowering plant, native to Europe, Asia, northern Africa, and western North America, and is the best-known member of the nettle genus Urtica. The species is divided into six subspecies, five of which have many hollow stinging hairs called trichomes on the leaves and stems, which act like hypodermic needles, injecting histamine and other chemicals that...

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