Liriodendron tulipifera.

Botanical name: 

Liriodendron tulipifera Linn. Magnoliaceae. Poplar. Tulip Tree. Whitewood.

Eastern North America. The root is used to prepare an agreeable liquor. The Canadians use the root to correct the bitterness of spruce beer and to give it a lemon flavor.

Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.