Visit the Indiana Plant Atlas (IPA) -- the IPA compiles and presents data on county-level occurrence of Indiana’s spontaneous flora – plants that grow outside of cultivation. Thousand of photos of live plants are available on the Atlas. Our master list of what grows in Indiana is from Yatskievych, Dolan, Moore, King and Kartesz Indiana Vascular Plants Catalog (in prep.) Nomenclature in the IPA is based on the Catalog. For a plant to be included in the Catalog, its occurrence in Indiana must be documented by at least one herbarium specimen.