pimpernel

noun

1. (archaic)A plant of the genus Pimpinella, especially burnet saxifrage (Pimpinella saxifraga).
2. Any of various plants of the genus Anagallis, having small red, white or purple flowers, especially the scarlet pimpernel (Anagallis arvensis).

   “Common Pimpernel has diverse weak square stalks lying on the ground, beset all along with two small and almost round leaves at every joint [...].”

   “Pimpernel (poor man's weather glass) was also a protection, but as the gatherer collected the herbs, he must chant a certain incantation and continue to do so twice a day for 15 days[.]”

3. Sanguisorba spp.
4. Sanguisorba spp.
5. (Canada, US)A yellow pimpernel (Taenidia integerrima)
6. (figuratively)Someone resembling the fictional Scarlet Pimpernel; a gallant dashing resourceful man given to remarkable feats of bravery and derring-do in liberating victims of tyranny and injustice.

   “Lined up solidly with the Pimpernels and with the persecuted.”