Rudbeckia fulgida uses a wide array of insects as pollinators. This particular species is very vigorous and has a high natural disease-resistance. For this reason, it is commonly hybridized with a number of other wildflowers in the hopes of creating progeny with the same resistance. Tomanthera auriculata is a known hemiparasite, attaching haustoria to the roots of Rudbeckia fulgida. (Cunningham & Parr, 1990.)