cud·weed /ˈkʌdˌwid, ||ˈkʊd ||ˈkud-/
  鼠麴草
  Cud·weed n.  Bot. A small composite plant with cottony or silky stem and leaves, primarily a species of Gnaphalium, but the name is now given to many plants of different genera, as Filago, Antennaria, etc.; cottonweed.
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  cudweed
       n 1: any of numerous plants of the genus Gnaphalium having
            flowers that can be dried without loss of form or color
       2: any plant of the genus Filago having capitate clusters of
          small woolly flower heads [syn: cotton rose, filago]
       3: perennial cottony-white herb of southwestern United States
          [syn: western mugwort, white sage, prairie sage, Artemisia
          ludoviciana, Artemisia gnaphalodes]