There are at least 7 members of the order Urticales found in Montana. Some of these species are exotics (not native to Montana). Cannabis Family: Cannabaceae Humulus lupulus, common hop Cannabis sativa, marijuana Elm Family: Ulmaceae Celtis occidentalis, common hackberry Ulmus americana, American elm Ulmus pumila, Siberian elm Stinging nettles Family: Urticaceae Parietaria pensylvanica, Pennsylvania pellitory Urtica dioica, stinging nettle Further reading See also List of dicotyledons of Montana Notes Montana