pipewort
  谷精草
  Pipe·wort n. Bot. Any plant of a genus (Eriocaulon) of aquatic or marsh herbs with soft grass-like leaves.
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  pipewort
       n : aquatic perennial of North America and Ireland and Hebrides
           having translucent green leaves in a basal spiral and
           dense buttonlike racemes of minute white flowers [syn: Eriocaulon
           aquaticum]