pimpernel[pim′pər nel′, -nəl]
pimpernel definition by Webster's New World
Origin: Middle English pympernelle ; from Old French piprenelle ; from Late Latin pimpinella, an herb with medicinal uses, probably altered ; from an unverified form piperinella, ultimately ; from Classical Latin piper, pepper: its fruit resembles small peppercorns
pimpernel definition by American Heritage Dictionary
Origin: Middle English pimpernelle, from Old French, alteration of piprenelle, from Late Latin pimpinella, perhaps from Latin piper, pepper; see pepper.