Any of various herbaceous, root-parasitizing plants of the genus Agalinis, native to temperate regions of the Western Hemisphere, having large pink, purple, or white flowers with yellow markings in some species.
Any of a genus (Gerardia) of American plants of the figwort family, with showy yellow, white, or pinkish flowers: it is sometimes parasitic on roots.
Origin of gerardia
- New Latin Gerardia former genus name after John Gerard (1545–1612), English botanist
From American Heritage Dictionary of the English Language, 5th Edition