ros·in·weed /ˈrɑzṇˌwid, ˈrɔ-/
  松香草
  Ros·in·weed n. Bot. (a) The compass plant. See under Compass. (b) A name given in California to various composite plants which secrete resins or have a resinous smell.
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  rosinweed
       n 1: North American perennial having a resinous odor and yellow
            flowers [syn: Silphium laciniatum]
       2: any of various western American plants of the genus
          Grindelia having resinous leaves and stems formerly used
          medicinally; often poisonous to livestock [syn: gumweed,
           gum plant, tarweed]