gerardia noun. [dʒɪ'rɑ:dɪǝ] E19.
[mod. Latin (see below), from John Gerard (1545-1612), English herbalist + -IA¹.]
Any of various purple- or yellow-flowered parasitic N. American plants of the figwort family, formerly referred to a genus Gerardia and now to the genera Agalinis and Aureolaria respectively.

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