|Glenleven is fast-growing and open with leaves to 4 inches long. In general, Tilia cordata is a large deciduous tree. Growth habit is pyramidal in youth, dense and rounded in maturity. Gray brown bark has ridges and furrows on mature specimens. Foliage is shiny, dark green in summer, yellow in fall. Fragrant yellow flowers are borne on hanging 2 to 3 inch cymes in early to mid summer. This species tolerates air pollution more than other Tilias, and is often used as a boulevard tree. Excellent shade tree for large areas, can also be pruned into a hedge. Native to Europe, cultivated since ancient times. Many cultivars are available.