''Pinus roxburghii'', commonly known as chir pine or longleaf Indian pine,
is a species of
pine
A pine is any conifer tree or shrub in the genus ''Pinus'' () of the family Pinaceae. ''Pinus'' is the sole genus in the subfamily Pinoideae. The World Flora Online created by the Royal Botanic Gardens, Kew and Missouri Botanical Garden accepts ...
tree
native
Native may refer to:
People
* Jus soli, citizenship by right of birth
* Indigenous peoples, peoples with a set of specific rights based on their historical ties to a particular territory
** Native Americans (disambiguation)
In arts and entert ...
to the
Himalayas
The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 10 ...
. It was named after
William Roxburgh
William Roxburgh FRSE FRCPE FLS (3/29 June 1751 – 18 February 1815) was a Scottish surgeon and botanist who worked extensively in India, describing species and working on economic botany. He is known as the founding father of Indian botany. ...
.
Description
''Pinus roxburghii'' is a large
tree
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...
reaching with a trunk diameter of up to , exceptionally . The
bark is red-brown, thick and deeply fissured at the base of the trunk, thinner and flaky in the upper crown. The
leaves are needle-like, in fascicles of three, very slender, long, and distinctly yellowish green.
The
cones
A cone is a three-dimensional geometric shape that tapers smoothly from a flat base (frequently, though not necessarily, circular) to a point called the apex or vertex.
A cone is formed by a set of line segments, half-lines, or lines conn ...
are ovoid conic, long and broad at the base when closed, green at first, ripening glossy chestnut-brown when 24 months old. They open slowly over the next year or so, or after being heated by a
forest fire, to release the seeds, opening to broad. The seeds are long, with a wing, and are wind-
dispersed.
Similar species
''Pinus roxburghii'' is closely related to ''
P. canariensis'' (Canary Island pine), ''
P. brutia'' (Turkish pine) and ''
P. pinaster'' (maritime pine), which all share many features with it. It is a relatively non-variable species, with constant morphology over the entire range.
Chemistry
''Pinus roxburghii'' contains large amounts of
taxifolin
Taxifolin (5,7,3',4'-flavan-on-ol), also known as dihydroquercetin, belongs to the subclass flavanonols in the flavonoids, which in turn is a class of polyphenols.
Stereocenters
Taxifolin has two stereocenters on the C-ring, as opposed to quer ...
.
Distribution and habitat
![Pinus roxburghii Ranikhet](https://upload.wikimedia.org/wikipedia/commons/3/37/Pinus_roxburghii_Ranikhet.jpg)
The native range extends from
Tibet
Tibet (; ''Böd''; ) is a region in East Asia, covering much of the Tibetan Plateau and spanning about . It is the traditional homeland of the Tibetan people. Also resident on the plateau are some other ethnic groups such as Monpa, Taman ...
and
Afghanistan
Afghanistan, officially the Islamic Emirate of Afghanistan,; prs, امارت اسلامی افغانستان is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is bordere ...
through
Pakistan
Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's fifth-most populous country, with a population of almost 243 million people, and has the world's second-lar ...
, across northern
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
(in
Jammu and Kashmir,
Himachal Pradesh
Himachal Pradesh (; ; "Snow-laden Mountain Province") is a state in the northern part of India. Situated in the Western Himalayas, it is one of the thirteen mountain states and is characterized by an extreme landscape featuring several peaks ...
,
Uttarakhand
Uttarakhand ( , or ; , ), also known as Uttaranchal ( ; the official name until 2007), is a state in the northern part of India. It is often referred to as the "Devbhumi" (literally 'Land of the Gods') due to its religious significance and ...
,
Sikkim
Sikkim (; ) is a state in Northeastern India. It borders the Tibet Autonomous Region of China in the north and northeast, Bhutan in the east, Province No. 1 of Nepal in the west and West Bengal in the south. Sikkim is also close to the Silig ...
and
Arunachal Pradesh
Arunachal Pradesh (, ) is a state in Northeastern India. It was formed from the erstwhile North-East Frontier Agency (NEFA) region, and became a state on 20 February 1987. It borders the states of Assam and Nagaland to the south. It shares ...
),
Nepal
Nepal (; ne, :ne:नेपाल, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne,
सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in S ...
and
Bhutan
Bhutan (; dz, འབྲུག་ཡུལ་, Druk Yul ), officially the Kingdom of Bhutan,), is a landlocked country in South Asia. It is situated in the Eastern Himalayas, between China in the north and India in the south. A mountainou ...
, to
Myanmar
Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...
.
It generally occurs at lower altitudes than other pines in the
Himalayas
The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 10 ...
, from , occasionally up to . The other Himalayan pines are ''
P. wallichiana'' (blue pine), ''
P. bhutanica'' (Bhutan white pine), ''
P. armandii'' (Chinese white pine), ''
P. gerardiana'' (chilgoza pine), ''
P. densata'' (Sikang pine) and ''
P. kesiya'' (Khasi pine).
Ecology
Owing to its shallow roots it is attributed to
soil erosion, particularly in the Himalayas. It does not allow any vegetation to grow around it by making soil more
acidic
In computer science, ACID ( atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. In the context of databases, a ...
through its fallen needles.
Usually, the accumulating carpet of needles on the forest floor under these trees makes conditions unfavourable for many common plants and trees to grow. The most common trees which are able to grow in this environment are ''
Rhododendron'', banj oak (''
Quercus leucotrichophora'') and trees from the family
Ericaceae
The Ericaceae are a family of flowering plants, commonly known as the heath or heather family, found most commonly in acidic and infertile growing conditions. The family is large, with c.4250 known species spread across 124 genera, making it th ...
(known locally as ''eonr'' and ''lodar''). This could possibly be due to the relative immunity from fire that the thick bark of these species gives them. The
Himalayan nettle (''Girardinia diversifolia'') is another plant which seems to thrive well under this tree.
The
caterpillars of the
moth
Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...
''
Batrachedra silvatica'' are not known from foodplants other than chir pine. The
white-bellied heron
The white-bellied heron (''Ardea insignis'') also known as the imperial heron or great white-bellied heron, is a large heron species living in the foothills of the eastern Himalayas in northeast India and Bhutan to northern Myanmar. It inhabits u ...
(''Ardea insignis''), a large
critically endangered heron, is known to roost in chir pine.
Uses
Chir pine is widely planted for
timber
Lumber is wood that has been processed into dimensional lumber, including beams and planks or boards, a stage in the process of wood production. Lumber is mainly used for construction framing, as well as finishing (floors, wall panels, w ...
in its native area, being one of the most important trees in
forestry
Forestry is the science and craft of creating, managing, planting, using, conserving and repairing forests, woodlands, and associated resources for human and environmental benefits. Forestry is practiced in plantations and natural stands. ...
in northern Pakistan, India and Nepal. For local building purposes, the wood of this tree is the least preferred, as it is the weakest and most prone to decay when compared with other conifers. However, in most low altitude regions, there is no other choice, except for the fact that these being tropical latitudes there are other trees at lower altitudes.
When this species of pine tree reaches a large girth, the bark forms flat patches which can be broken off in chunks . It has a layered structure like plywood, but the individual layers have no grain. The locals use this easily carvable bark to make useful items like lids for vessels. Blacksmiths of that region also use this bark exclusively as the fuel for their furnaces.
Old trees which die from fire or drought, undergo some metamorphosis in their wood due to the crystallization of the resin inside the heart wood. This makes the wood become brightly coloured (various shades from translucent yellow to dark red) and very aromatic with a brittle, glassy feel. This form of wood known as ''jhukti'' by the locals is very easy to ignite, since it never gets wet or waterlogged. They use it for starting fires and even for lighting, as a small piece of the wood burns for a long time (owing to the high resin content). Of all the conifer species in the area, only ''P. roxburghoo'' seems to be ideal for that purpose.
Every autumn, the dried needles of this tree form a dense carpet on the forest floor, which the locals gather in large bundles to serve as bedding for their cattle, for the year round. The green needles are also used to make tiny hand brooms.
The locals of the
Jaunsar-Bawar
Jaunsar-Bawar is a hilly region in Garhwal division of Uttarakhand, northern India. It is located in the north-west of Dehradun district, along the border with the state of Himachal Pradesh.
Ethnically, Jaunsar-Bawar comprises two regions, inh ...
region of Uttarakhand have several uses for this tree, which is known in the local dialect as ''salli''.
It is also occasionally used as an ornamental tree, planted in parks and gardens in hot dry areas, where its heat and drought tolerance is valued.
Resin
It is also tapped commercially for
resin
In polymer chemistry and materials science, resin is a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers. Resins are usually mixtures of organic compounds. This article focuses on n ...
. On
distillation
Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation, usually inside an apparatus known as a still. Dry distillation is the heat ...
, the resin yields an essential oil, commonly known as
turpentine
Turpentine (which is also called spirit of turpentine, oil of turpentine, terebenthene, terebinthine and (colloquially) turps) is a fluid obtained by the distillation of resin harvested from living trees, mainly pines. Mainly used as a spec ...
, and non-volatile
rosin
Rosin (), also called colophony or Greek pitch ( la, links=no, pix graeca), is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene comp ...
. The proportion of rosin and turpentine oil in chir pine is 75% and 22% respectively with 3% losses, etc.
The turpentine is chiefly used as a solvent in pharmaceutical preparations, perfume industry, in manufacture of synthetic pine oil, disinfectants, insecticides and denaturants. It is one of the most important basic raw materials for the synthesis of
terpene
Terpenes () are a class of natural products consisting of compounds with the formula (C5H8)n for n > 1. Comprising more than 30,000 compounds, these unsaturated hydrocarbons are produced predominantly by plants, particularly conifers. Terpenes ...
chemicals which are used in a wide variety of industries such as adhesives, paper and rubber, etc.
Chir pine rosin is principally used in paper,
soap
Soap is a salt of a fatty acid used in a variety of cleansing and lubricating products. In a domestic setting, soaps are surfactants usually used for washing, bathing, and other types of housekeeping. In industrial settings, soaps are use ...
, cosmetics, paint, varnish, rubber and polish industries. Besides these, other uses include manufacture of linoleum, explosives, insecticides and disinfectants, as a flux in soldering, in brewing and in mineral beneficiation as a frothing agent.
Presently, India imports resin which is far superior in quality as well as cheaper than the indigenous one. Quality of resin depends on the
pinene
Pinene is a collection of unsaturated bicyclic monoterpenes. Two geometric isomers of pinene are found in nature, α-pinene and β-pinene. Both are chiral. As the name suggests, pinenes are found in pines. Specifically, pinene is the major comp ...
content. Imported resin contains 75–95% pinenes, whereas chir pine resin contains only about 25% pinenes.
References
External links
Retapping Chir Pines the Environmentally Friendly WayPlants For A Future: Chir PineFlora Indica: ''P. longifolia'' (Chur Pine), III, p. 651.
{{Authority control
roxburghii
Trees of Afghanistan
Trees of Myanmar
Trees of the Indian subcontinent
Flora of Tibet
Plants described in 1897
Trees of temperate climates
Least concern plants
Trees of Nepal