- Carduus, genus Carduus - genus of annual or perennial Old World prickly thistles
--1 is a kind of asterid dicot genus
--1 is a member of
--1 has members:Compositae, family Compositae, Asteraceae, family Asteraceae, aster family welted thistle, Carduus crispus; musk thistle, nodding thistle, Carduus nutans