categoryZTrees Trees List 
categoryZConiferous Coniferous List 
categoryZEvergreen Evergreen List 

LODGEPOLE PINE

Pinus contorta ssp. latifolia

Pine Family [Pinaceae]  

Cones (ripen):
cones8may

Leaves:

category
category8Trees
 
category
category8Coniferous
 
category
category8Evergreen
 
status
statusZalien
 

flower
flower8red
female
flower
flower8orange
male
petals
petalsZ0
 
stem
stem8round
 
smell
smell8aromatic smell?pleasant
aromatic
sex
sexZmonoecious
 

6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
A non-native tree introduced from the Rocky Mountains part of North America in the 1850's which is now often planted in both upland areas (as here) and in large gardens, growing to 20m high. It is very resilient to cold and wet soils.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
It is monoecious with male and female flowers are on the same plant, but somewhat separated from each other into smaller groupings.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
   When flowering, the male flowers are orange (top left); the female smaller and red (bottom right).


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female flowers with red tips and green turning orange cones which are angled downwards. The needle leaves are long (4 to 10cm) bright-green and twisted. They consist of paired leaflets emerging together from a common fawn-brown sheath at the bottom.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female flowers (with orange male ones in the distance) looking a bit like church candles. Centrally there is a younger female cone above an older one.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female flowers and two recently produced female cones which are between 2 and 6cm long and hanging downwards below. The leaves on the female flower spike are much shorter (and angled upwards) than the much longer stem leaves. The stem leaves are twisted.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female flower. The leaves surrounding all sides of the female flower spike are in pairs as are stem leaves. They also have thin translucent sheaths around the middle part, and pale orange to brown around the lower parts.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female flower. The female flower consists of spirals of tapering red objects radiating out near the top. Lower down is an outer layer of brownish sheaths which splay outwards nearer the top of the sheath.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female flower. Closer up.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female flower. The claw-like leaves surrounding the female inflorescence have vertical rows of tiny pimples. The transparent 'cellophane-like' wrapping is crinkly.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female flower. The transparent 'cellophane-like' wrapping is crinkly.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female. A bright green female cone with the long brown (blunt at the tip) spikes which droop downwards slightly.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female. The old cones from last year (or maybe even previous years) can linger on the tree. This is one such specimen. The identifying spikes on the previous photograph do not linger, but fall off.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Female. This is another specimen of a cone from a previous year.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Male flowers. The male flowers (aka male cones) are much larger than the female flowers, more prominent and a bright orange colour.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Male flowers/cones consist of a plethora of misshapen orange 'discs' in a short spike.


6th May 2011, forestry plantation, Whiteley Nab, Glossop, Derbys. Photo: © RWD
 Male flowers/cones and their irregular trumpet-shaped objects (see the ones near bottom left corner for their trumpet-shape).


It is monoecious with separate male and female flowers on the same plant. The trunk is dark-red brown (not that you can see it hidden by all the foliage in the photos). The sub-species most used in British forestry is ssp. latifolia which has longer leaves (mostly over 6cm long) (whereas ssp. contorata - named after the twisted nature of the cones in the cone - usually has leaves less than 6cm long. Ssp. latifolia is also taller and less bushy than is ssp. contorta.

Easily confused with : several other subspecies of Pinus contorta, namely Shore Pine (Pinus contorta ssp. contorta) and Sierra Lodgepole Pine (Pinus contorta ssp. murrayana)

When the leaves are crushed it smells very aromatic with a mixture of MonoTerpenes and Sesquiterpenes. The terpenes present in the tree resin belong to three groups of terpenes: those with the camphane or pinene skeletons, those with mono-cyclic or acyclic frames, and those which are Sesquiterpenes.

MONOTERPENES

Identified in the resin are: Limonene (2.4%), Sabinene (2.1%), α-phellandrene (0.7%) and the aliphatic hydrocarbon heptane. Further terpenes are produced by the tree in response to attack by insects or pathogens as a defence mechanism.

Limonene is a cyclic monoterpene which has a strong smell of lemons and is indeed contained within lemon peel along with a few other MonoTerpenes. Limonene is chiral, having two mirror image forms, lemons containing the (+)-limonene (D-limonene) enantiomer which is dextro-rotatory, rotating the plane of polarised light. Limonene is also present in Oranges, Common Juniper, Spear Mint, Monkey-Puzzle, Man Orchid, Chinese Quince, Sage, Golden Samphire, Rock Samphire and Yarrow amongst many other plants. It degrades quickly in the presence of Ozone gas (O3) which is present in the air at parts per million concentrations and is produced by ultraviolet light acting on Nitrogen Dioxide pollutants near ground level. This is bad news for Limonene is very likely a messenger and signalling molecule broadcast to pollinators to attract their attention and probably interpretated by other plants for reasons as yet unknown. Even just a few ppm of Ozone will degrade the Limonene into a plethora of other radicals and moieties (1200 components have been experimentally detected) before it travels a few metres from the plants.

α-Pellandrene is a double-bond isomer of β-Phellandrene and is also found in Eucalyptus phellandra (which is now called Eucalyptus radiata). It has a peppery-minty smell slightly reminiscent of citrus fruit.

JASMONATE PLANT HORMONES (AUXINS)



Jasmonic Acid, and its metabolites, is a plant hormone and is derived from Linolenic Acid. It plays roles in regulating plant development and growth, including growth inhibition, senescence, tendril coiling (but obviously not in Lodgepole Pines), seed germination, flower development, flower form, flowering time, flower opening, the number of open flowers, and leaf fall. It also has a hand in tuber formation of potatoes, yams and onions.

It also plays a role in the wounding response and systemic acquired resistance. It acts as a defence chemical against insects, interfering with their digestive processes.

Jasmonic Acid can be converted into the ester Methyl Jasmonate within the plant, which plays similar roles in plant defence as Jasmonic Acid. Plants produce both chemicals in response to stress or damage. Methyl Jasmonate also signals to remoter parts of the plant (via propagation through the air) forearming them against similar damage or attack, so that they are prepared. But Methyl Jasmonate is a gas which is not very active in plants, but as a gas is able to waft over to nearby plants whereupon it diffuses into the pores of the leaves of nearby un-damaged plants, where, acted upon by water, it gets converted into the water-soluble Jasmonic Acid. The Jasmonic Acid then attaches itself to specific receptors in cells triggering the leafs defence mechanism.

Methyl Jasmonate can also induce the formation of ethylene. Ethylene, H2C=CH2, is a gas and plant hormone that enhances the ripening of nearby fruits.

See Fungal Attack and Resistance.

ALKANES

TetraMethylMethane (aka Neopentane or DiMethylPropane) is an alkane hydrocarbon produced within pine cones. It is gaseous and utilised by the trees as a pesticide against rodents, such as squirrels, who are prone to remove and bury the cones. It is also manufactured commercially for use in products to kill rats and fleas. Isomeric with both Pentane and IsoPentane TetraMethylMethane is an extremely inflammable gas. However, unlike its isomers, it is a gas at normal temperatures and pressures (NTP) with melting point of about 9C, whereas pentane (b.p. 36C) and isopentane (b.p. 28C) are both liquids. However, Neopentane can liquefy on cold days when the temperature drops below 9C.


  Pinus contorta ssp. latifolia  ⇐ Global Aspect ⇒ Pinaceae  

Distribution
 family8Pine family8Pinaceae
 BSBI maps
genus8Pinus
Pinus
(Pine Trees)

LODGEPOLE PINE

Pinus contorta ssp. latifolia

Pine Family [Pinaceae]  

WildFlowerFinder Homepage