Rudbeckia hirta L.

Rudbeckia hirta was first described by Linnaeus in 1753 in Species Plantarum. In 1904, O.A. Farwell described the variety pulcherrima in the Annual Report of the Michigan Academy of Science. Then, in 1957, R. Perdue, Jr., published "Synopsis of Rudbeckia Subgenus Rudbeckia" in which the four recognized varieties included hirta, pulcherrima, angustifolia and floridana.