Traditional keys can be downloaded and used with an internet browser to keep the link functions, or printed and used like a traditional, printed key. The interactive keys are based on a character set in a database and can be used only with a computer. As of May 1999, the herbarium's holdings consisted of 817,999 dried collections of plants, fungi, lichens, and other plant-like organisms. This site maintains an extensive list of Minnesota flora. The specimen catalogue has over 2400 types and possible type specimens.
All types are available for institutional loans to taxon experts.
Other vascular plant catalogues are available as well.