2010 BONAP North American Plant Atlas

North American Plant Atlas


                                      Map Color Key:


  Species present in state   and native


Species present and not rare Species extinct Species native, but adventive in state  Species waif


  Species present in state   and exotic

Species present and    rare


    Species noxious  (includes noxious-weed seeds) Species eradicated  

Species not present in state Species extirpated (historic) Species exotic and present Questionable Presence (cross-hatched)  

In some cases, individual species maps will have multiple colors regarding nativity [e.g., Chenopodium album, dark olive green (native), orange (native historic), teal (adventive), and also dark navy blue (exotic)]. This map suggests that in various U.S. states, at least one infraspecific taxon of the species complex is native, another is exotic, a third is adventive and the fourth rare. Once published, the Floristic Synthesis will show state-level nativity and rarity for each infraspecific taxon, however, for this website, we have provided only full species-level maps. 

We only have TWO state-background-colors, dark green (native) and dark blue (exotic). If a species is NATIVE TO THE North American continent, state-background color is dark green, lF EXOTIC, state background color is dark blue. All other colors including; teal, yellow, pink, red, black, etc., pertain to nativity of the individual state and its counties. Therefore, the state-background color of the map for Chasmanthium latifolium in Wisconsin is dark green, indicating native to NORTH AMERICA. BUT(!), the single county occurrence of the species in Wisconsin is TEAL colored, indicating that in Wisconsin, the species is adventive.

For comparison, take a look at BONAP's map of Ginkgo biloba. This species is EXOTIC to North America, indicated by the dark blue background color of the map. Notice the lighter blue colors of the individual counties, indicating presence only there within each state.



Last updated February 8, 2024.