Anyway, I have been using the following site for the last 10 years or so to check edibility and other uses of the plants I photograph and/or collect for the herbarium. Most entries are native to N America, but a few early introductions were used by Native Americans and are in the database. Database is sponsored by University of Minnesota - Dearborn. Best results are obtained using binomials, but common names also return results.
Native American Ethnobotany: A Database of Foods, Drugs, Dyes and Fibers of Native American Peoples, Derived from Plants.
Genus Taraxacum, i.e. dandelions, returns 81 records: > Taraxacum
And speaking of Dandelions, did you know they produce latex?
... As source of natural rubber
Dandelions secrete latex when the tissues are cut or broken, yet in the wild type, the latex content is low and varies greatly. Using modern cultivation methods and optimization techniques, scientists in the Fraunhofer Institute for Molecular Biology and Applied Ecology (IME) in Germany developed a cultivar that is suitable for commercial production of natural rubber. The latex produced exhibits the same quality as the natural rubber from rubber trees. In collaboration with Continental Tires, IME is building a pilot facility. As of May 2014, the first prototype test tires made with blends from dandelion-rubber are scheduled to be tested on public roads over the next few years.