#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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