* Wisconsin
Vascular Plants
[University of Wisconsin Herbarium checklist of vascular plants in
Wisconsin; complete with images, distributional maps, habitat, and synonomy]
* University of Michigan Herbarium Online Plants
[University of Michigan Herbarium key to vascular plants in
Michigan; BEAUTIFUL images, distributional maps, habitat, and up-to-date names of most species]
* Ferns
and Fern Allies of Wisconsin
[UW Green Bay site with keys and glossary to Wisconsin's cryptogams]
* Trees
of Wisconsin and Shrubs
of Wisconsin
[UW Green Bay site with keys and images to Wisconsin's woody plants]
* Wisconsin
Threatened and Endangered Species
[DNR site with listings, information, and images]
* Invasive
Plants of Wisconsin
[Invasive Plants Association of Wisconsin website; specific invasive
plants of NE WI site also]
* iNaturlist
[iNaturalist website; download the app for smartphone and/or laptop]