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Related to gerardia: giardia
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.
[New Latin Gerardia, former genus name, after John Gerard (1545-1612), English botanist.]
(Plants) any plant of the genus Gerardia