balsam poplar

a poplar (Populus balsamifera) of N North America, having buds that are coated with a fragrant resin

See balsam poplar in American Heritage Dictionary 4

noun
A poplar tree of northern North America (Populus balsamifera) having ovate leaves and large buds coated with a sticky, fragrant resin. Also called hackmatack, tacamahac.
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