Populus × canadensis

Populus × canadensis, known as the hybrid black poplar, Canadian poplar or Carolina poplar, is an artificial hybrid between Populus nigra from Europe and Populus deltoides from North America, which arose when the two parent species were first brought together in cultivation in France soon after 1700. It is a vigorous, broadly columnar, deciduous tree growing to 40–45 m (131–148 ft), which is commonly used in plantation forestry and by landscape architects. The tallest reliably measured, near the Weltenburg Abbey in Kelheim, Germany, is 47 metres tall, and the stoutest, in Baak in the Netherlands, is 8.5 metres girth....read more on Wikipedia.