ABSTRACT
In an unusual move, Linnaeus ([1753] 1957) gave the same species four namesBuphthalmum helianthoides, Silphium helianthoides, Silphium solidaginoides, and Rudbeckia oppositifolia (Reveal 1983). When Linnaeus made mistakes, he did it right. It was not until 1807 that the species was put in Heliopsis.
