- any plant of the North American genus Rudbeckia, cultivated for their showy flowers, which have golden-yellow rays and green or black conical centres: family Asteraceae (composites)
See also black-eyed Susan
WordReference Random House Unabridged Dictionary of American English © 2015
Plant Biologyany composite plant of the genus Rudbeckia, having alternate leaves and showy flower heads.
- Neo-Latin; named after Olaus Rudbeck (1630–1702), Swedish botanist; see -ia