MOTHERWORT
motherwort, Leonurus cardiaca
(noun) bitter Old World herb of hedgerows and woodland margins having toothed leaves and white or pale pink flowers
Source: WordNet® 3.1
Etymology
Noun
motherwort (plural motherworts)
Any of several perennial plants of the genus Leonurus, especially Leonurus cardiaca, used in traditional medicine to help with childbirth or treat uterine disorders. [from 13th c.]
Artemisia vulgaris.
Source: Wiktionary
Moth"er*wort`, n. (Bot.)
(a) A labiate herb (Leonurus Cardiaca), of a bitter taste, used
popularly in medicine; lion's tail.
(b) The mugwort. See Mugwort.
Source: Webster’s Unabridged Dictionary 1913 Edition