One of them sent photos recently of an extraordinary burl on a Norway maple tree in New Jersey.
FORBES: Trees with souls
The Norway maple, however, is a popular tree in central and eastern Canada, after being imported from Europe.
BBC: 'Wrong' maple leaf on Canadian banknotes
The hardy Norway maple is actually the most common in eastern Canadian cities.
WSJ: Canada's New Banknotes Strike Some as Loonie
The maple leaf depicted on the bills isn't an indigenous Canadian maple at all, but a nonnative and invasive Norway maple, he claimed in an email exchange with the Bank of Canada.
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