Populus simonii 'Fastigiata', commonly known as the Simon poplar, is a deciduous tree noted for its narrow, columnar growth habit. Typically reaching heights of 10-15 meters, it features upright branches and glossy, dark green leaves that turn golden-yellow in autumn. The tree produces small, inconspicuous flowers in early spring, followed by cottony seeds. 'Fastigiata' is well-suited to well-drained soils and thrives in full sun, demonstrating good tolerance to urban conditions and pollution. Its slender form and fast growth make it an excellent choice for windbreaks, screening, and narrow spaces in landscapes.