Urtica urens
Urtica urens L.
Stems quadrangular or channeled, few stems on the same plant, with stinging hairs. Stipules inconspicuous, persistent. Leaves opposite, simple; petiole 2–20 mm long, with scattered stinging hairs; blade elliptic to ovate, 6.5–29 x 5.5–23 mm, chartaceous in young plants, rugose-bullate in mature…
