any of various plants of the genus Senecio, esp S. integrifolius, a European species with yellow daisy-like flowers and rosettes of downy leaves: family Asteraceae (composites)
2.
a Eurasian plantain, Plantago psyllium (or P. indica), whose seeds resemble fleas and were formerly used as a flea repellent
3. another name for ploughman's spikenard
fleawort in American English
(ˈfliˌwɜrt)
noun
1.
any of several plants that supposedly ward off fleas, as a European aromatic plant (Inula conyza) of the composite family with rough leaves and yellow flowers
2.
a European plantain (Plantago psyllium) whose seeds, which more or less resemble fleas, are used as a laxative