There are at least 8 members of the Creosote Bush, Maple and Sumac order: Sapindales found in Montana.[1] Some of these species are exotics (not native to Montana).[2]
^Exotic species have been deliberately or accidentally introduced to areas outside of their native geographic range and are able to reproduce and maintain sustainable populations in these areas. These exotic populations may also be referred to as alien, introduced, invasive, non-native, or non-indigenous. "Species Status Codes, Exotics". Montana Natural Heritage Project. Retrieved 2011-06-17.
Further reading
Schiemann, Donald Anthony (2005). Wildflowers of Montana. Missoula, MT: Mountain Press Publishing. ISBN0-87842-504-7.