lombardy poplar(n = noun.plant) populus nigra italica - distinguished by its columnar fastigiate shape and erect branches;
is a kind of black poplar, populus nigra

lombardy poplar, n. a variety of poplar with an especially tall slender form.

aspen poplar, balsam poplar, black poplar, downy poplar, gray poplar, grey poplar, lombardy, necklace poplar, poplar, poplar bluff, poplar tree, silver-leaved poplar, swamp poplar, tulip poplar, western balsam poplar, white poplar, yellow poplar