Map Color Key:

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. 

Please note, 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 on the map. Notice the lighter blue colors of individual counties, indicate presence in these counties only within each state.

Last updated May 21, 2026.