What is the plant
Pinus wallichiana is a coniferous evergreen tree native to the Himalaya, Karakoram and Hindu Kush mountains, from eastern Afghanistan east across northern Pakistan and north west India to Yunnan in southwest China. It grows in mountain valleys at altitudes of 1800–4300 m (rarely as low as 1200 m), reaching 30–50 m (98–164 ft) in height. It favours a temperate climate with dry winters and wet summers. In Pashto, it is known as Nishtar.
This tree is often known as Bhutan pine, (not to be confused with the recently described Bhutan white pine, Pinus bhutanica, a closely related species). Other names include blue pine, Himalayan pine and Himalayan white pine. In the past, it was also known by the invalid botanic names Pinus griffithii McClelland or "Pinus excelsa" Wall., Pinus chylla Lodd. when the tree became available through the European nursery trade in 1836, nine years after the Danish botanist Nathaniel Wallich (1784~1856) first introduced seeds to England.
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