#genus_Carduus__Carduus genus of annual or perennial Old World prickly thistles
supertype: #asterid_dicot_genus__asteriddicotgenu genus of more or less advanced dicotyledonous herbs and some trees and shrubs
member of: #family_Compositae
member: #welted_thistle__Carduus_crispus European biennial introduced in North America having flower heads in crowded clusters at ends of spiny-winged branches
member: #musk_thistle__nodding_thistle__noddingthistle__Carduus_nutans Eurasian perennial naturalized in eastern North America having very spiny white cottony foliage and nodding musky crimson flower heads; valuable source of nectar
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