hawk·weed /ˈhɔkˌwid/
  水蘭屬之一種
  Hawk·weed n. Bot. (a) A plant of the genus Hieracium; -- so called from the ancient belief that birds of prey used its juice to strengthen their vision. (b) A plant of the genus Senecio (Senecio hieracifolius).
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  hawkweed
       n 1: any of various plants of the genus Pilosella
       2: any of numerous often hairy plants of the genus Hieracium
          having yellow or orange flowers that resemble the
          dandelion