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bitterweed

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bitterweed


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Bitterweed  \Bit"ter*weed`\,  n.  (Bot.) 
  A  species  of  Ambrosia  ({A.  artemisi[ae]folia});  Roman  worm 
  wood.  --Gray. 
 
  From  WordNet  r  1.6  [wn]: 
 
  bitterweed 
  n  1:  widespread  European  weed  with  spiny  tongue-shaped  leaves  and 
  yellow  flowers;  naturalized  in  United  States  [syn:  {oxtongue}, 
  {bristly  oxtongue},  {bugloss},  {Picris  echioides}] 
  2:  any  of  numerous  chiefly  North  American  weedy  plants 
  constituting  the  genus  Ambrosia  that  produce  highly 
  allergenic  pollen  responsible  for  much  hay  fever  and 
  asthma  [syn:  {ragweed},  {ambrosia}] 




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