laportea canadensis, commonly called canada nettle

allergic allergy america annual background botany branch called canada canadensis central closeup commonly contact dangerous dermatitis detail disambiguation diversilobum eastern family flora foliage forest garden green greenery herbaceous irritating ivy laportea leaf lots macro native natural nature nettle north organic outdoor perennial plant poison poisonous radicans rash reaction scratch spring stem summer thorns three toxic toxicodendron toxin tree urticaceae vine watchout weed weeding wild woodnettle