Carduus

n.

1.

a genus of annual or perennial Old World prickly thistles.

Thesaurus

Noun

1.

Carduus - genus of annual or perennial Old World prickly thistles genus Carduus asterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubs aster family, Asteraceae, Compositae, family Asteraceae, family Compositae - plants with heads composed of many florets: aster; daisy; dandelion; goldenrod; marigold; lettuces; ragweed; sunflower; thistle; zinnia Carduus crispus, welted thistle - European biennial introduced in North America having flower heads in crowded clusters at ends of branches Carduus nutans, musk thistle, nodding thistle - Eurasian perennial naturalized in eastern North America having very spiny white cottony foliage and nodding musky crimson flower heads; valuable source of nectar