felonwort

From felon +‎ wort, from its supposed efficacy in treating felons ("inflammations around the nail").

felonwort (uncountable)

1. Bittersweet nightshade (Solanum dulcamara).
2. Other plants traditionally used to treat the type of bacterial infection known as a felon, such as celandine

• “felonwort”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• Wolferton