File photo of the new Canadian 20 dollar bill made of polymer displayed at the Bank of Canada in Ottawa

 
File photo of the new Canadian 20 dollar bill made of polymer displayed at the Bank of Canada in Ottawa
The new Canadian 20 dollar bill made of polymer is displayed at the Bank of Canada in Ottawa in this May 2, 2012, file photo. Canada is known for the sugar maple, emblazoned on its red-and-white flag, but the Bank of Canada has put what one careful botanist says is a foreign Norway maple leaf on its new currency. The untrained eye might not at first spot the difference between the maple leaf on the new $20, $50 and $100 bills and the sugar maple that is endemic to North America. REUTERS/Chris Wattie/Files