Urticaceae - nettlen family

Gerald A. Mulligan (Agriculture Canada, Ottawa, retired) 1600 Apeldoorn Ave., Ottawa, Ontario, Canada, K2C1V5 Urtica dioica L., stinging nettle, ortie dioïque Perennial, stems 1 to 8 feet (3 to 24 dm.) high; flowers inconspicuous; throughout; roadsides, waste places, and along margins of streams, rivers, and lakes; both native populations and European introductions occur in our area. Contact with a toxic liquid present in its sharp hairs will cause intense itching and pain. Click on a photo to view an enlarged image. Weed Name Photo Weed Name Photo stinging nettle, ortie dioïque         stinging nettle, ortie dioïque          stinging nettle, ortie dioïque stinging nettle, ortie dioïque (inflorescence) stinging nettle, ortie dioïque (young plant showing stinging hairs)