Is Rudbeckia and Daviesia in the same family?
Rudbeckia Rudbeckia is a plant genus in the sunflower family. The species are commonly called coneflowers and black-eyed-susans; all are native to North America and many species are cultivated in gardens for their showy yellow or gold flower heads.
Dondisia Dondisia was a genus of flowering plants in the Rubiaceae family but is no longer recognized. It has been sunk into synonymy with "Canthium". It was originally described by Augustin Pyramus de Candolle in 1830.