Laportea canadensis (L.) Wedd.
Family: Urticaceae
Canadian wood-nettle
Laportea canadensis image
Michael Clayton  
Etymology: Laportea: for Francois L. de Laporte, Count of Castelnau, Entomologist of the 19th century
Plants: erect, perennial, 16"-40" tall forb with stinging hairs
Leaves: widely-oval, alternate, coarsely-toothed, hairy, long-stalked
Flowers: green to white, 1/8" wide; 5-parted female flowers in loose, long clusters (cymes) from the upper leaf axils and 4 -parted male flowers in smaller clusters (cymes) from the lower leaf axils; blooms July-Aug.
Fruits: oblique, dry seed
Habitat: moderate moisture; woods, forests; in rich soil
Hazardous: Careful, this plant is hazardous!
Conservation Status: Native - potentially invasive