Pinus gerardiana
Template:Short description Template:Redirect Template:Use dmy dates Template:Speciesbox Pinus gerardiana, commonly known as the chilghoza pine or neja, is a pine species native to parts of central and southern Asia, including the western Himalayas. The International Union for Conservation of Nature (IUCN) listed it as near threatened in 2011. The pine nuts are locally collected for consumption.
Description
The trees are Template:Convert tall with usually deep, wide and open crowns with long, erect branches. However, crowns are narrower and shallower in dense forests. The bark is very flaky, peeling to reveal light greyish-green patches. The branchlets are smooth and olive-green. The leaves are needle-like, in groups of three, Template:Convert long, and spread stiffly. They are glossy green on the outer surface, with blue-green stomatal lines on the inner face; their sheaths fall in the first year. The cones are Template:Convert long and Template:Convert wide when open, with wrinkled, reflexed apophyses and an umbo curved inward at the base. The seeds (pine nuts) are Template:Convert long and Template:Convert broad, with a thin shell and a rudimentary wing.<ref name="gymnobase">Template:Gymnosperm Database</ref>
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Similar species
P. gerardiana is similar to the closely related lacebark pine (Pinus bungeana), another pine with flaking bark. However, P. gerardiana has denser, longer, and more slender needles, as well as larger cones than P. bungeana.<ref name=handbook>Template:Cite book</ref>
Taxonomy
The scientific name commemorates Captain Patrick Gerard, a British army officer of the Bengal Native Infantry.<ref name=handbook /> who collected it during a 1823–25 military survey in India.<ref name="gymnobase" />
It was first published in A.B.Lambert, Descr. Pinus, ed. 3, 2: 144 bis in 1832.<ref name="Powo"/>
Distribution and habitat
P. gerardiana is native to Afghanistan, Pakistan, India, and Tibet.<ref name="Powo">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> It grows at elevations of Template:Convert.<ref name="iucn status 19 November 2021" /> It inhabits valley floors in the Himalayas, tending to grow among open vegetation on dry, sunny slopes.<ref name="iucn status 19 November 2021" />
Ecology
It often occurs in association with Cedrus deodara,<ref name="gymnobase" /> and Pinus wallichiana.
Since their seeds do not have a wing capable of enabling effective dispersal by wind, the seeds of P. gerardiana are dispersed by birds.<ref name="iucn status 19 November 2021" /> The Eurasian nutcracker (Nucifraga caryocatactes subsp. multipunctata) is one such species that does so.<ref name="gymnobase" />
P. gerardiana is also a secondary host for Himalayan dwarf mistletoe.<ref>Template:Cite book</ref>
Conservation
In 2011, this species was listed as near threatened on the IUCN Red List of Threatened Species. It was previously listed as Lower Risk/near threatened in 1998. P. gerardina forests have declined by an estimated 30% due to conversion of pine forests to farmland, intensive grazing, and overharvesting of the seed cones and timber for firewood.<ref name="iucn status 19 November 2021" /> The Himachal Pradesh State Forest Department has tried artificial regeneration of chilgoza pine at many places. However, performance of seedlings was found to be very poor.Template:Citation needed
Uses
Older trees that do not produce enough cones to harvest pine nuts from are felled for firewood. The wood is also used for local light construction and carpentry.<ref name="iucn status 19 November 2021" />
Food
Chilghoza seeds, or pine nuts, are harvested for consumption in autumn and early winter by knocking the cones off of the trees. The trees and seed harvesting rights are owned by local mountain clans and villages in some areas, from which they may be exported to markets in the northern Indian plains. In traditional harvesting practices, enough seeds are left behind for the forest to regenerate, but in areas controlled by private contractors, all cones are harvested.<ref name="iucn status 19 November 2021" />
Chilgoza pine nuts are rich in carbohydrates and proteins. The seeds are locally referred to and marketed as "chilgoza", "neja" (singular) or "neje" (plural). Chilghoza is one of the most important cash crops of Afghanistan,<ref>Template:Cite news</ref><ref>Template:Cite news</ref><ref>Template:Cite news</ref> as well as of Kinnaur and Pangi Valley of Chamba district of Himachal Pradesh, India.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> They are sold at approximately $20–$53 per kilograms in India.Template:Citation needed
