Abies densa

Abies densa, known as Sikkim fir or Bhutan fir, is an evergreen coniferous tree in the family Pinaceae, order Pinales, native to the eastern Himalayan region, including Sikkim in northeastern India, Bhutan, Tibet, and adjacent parts of Nepal and Yunnan Province in southwestern China. It grows at high elevations between approximately 2,700 and 4,000 metres in subalpine forests, forming extensive, often dense stands that give rise to its Latin name densa, meaning dense or thick, in reference to either the density of the forest or its foliage. Abies densa is a medium to large tree reaching 30 to 50 metres in favourable conditions, with a narrowly to broadly pyramidal crown. Its needles are flat, dark green, and shiny above, with two narrow to broad white stomatal bands beneath, and are typically arranged in comb-like rows on lateral branchlets. The seed cones are cylindrical, erect, dark purple when young, turning brownish at maturity and disintegrating on the tree as is typical for all Abies. Cone bracts may be visible between the scales or remain hidden, providing a taxonomic character. Abies densa forms ecologically critical subalpine forests in the eastern Himalayas, providing habitat for the red panda, Himalayan black bear, and numerous bird species. It is an important timber species in Bhutan and is increasingly subject to pressures from climate change, which may shift upward the altitudinal distribution of vegetation in the Himalayan region.