The Collaborative International Dictionary
Tordylium maximum
Hartwort \Hart"wort`\ (h[aum]rt"w[^u]rt`), n. (Bot.) A coarse umbelliferous plant of Europe ( Tordylium maximum).
Note: The name is often vaguely given to other plants of the same order, as species of Seseli and Bupleurum.
Wikipedia
Tordylium maximum
Tordylium maximum, known as hartwort, is an annual or biennial flowering plant in the carrot family ( Apiaceae).