Carthamus leucocaulos, the whitestem distaff thistle or glaucous starthistle, is a species of flowering plant in the family Asteraceae. It is native to Greece and the Aegean. It is known in California and Western Australia as an introduced species and a noxious weed. External links Jepson Manual Treatment Calphotos Photo gallery, University of California leucocaulos Flora of Greece Plants described in 1813