any of a genus (Pedicularis
) of perennial
plants of the figwort
family, with pinnately divided leaves and spiked clusters
of yellow, rose, or purple
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'lousewort'so called because sheep feeding on the plants were said to become infested with vermin