Dictionary
louse•wort
Pronunciation: (lous'wûrt", -wôrt"), [key]—
n.
any plant belonging to the genus
Pedicularis, of the figwort family, as the wood betony, formerly supposed to cause lice in sheep feeding on it: one species,
P. furbishiae (Furbish lousewort), of parts of Maine and New Brunswick, Canada, having finely toothed leaves and a cluster of yellow flowers, is endangered and was thought to be extinct until specimens were discovered in 1946 and again in 1976.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.