Pinus contorta Douglas ex Loudon

Tamarack pine (en), Pin tordu (fr)

Species

Gymnosperms > Pinales > Pinaceae > Pinus

Characteristics

Shrubs or trees to 50m; trunk to 0.  diam., straight to contorted; crown various according to genetic race. Bark brown to gray-or red-brown, platy to furrowed. Lower branches often descending, the upper spreading or ascending. Twigs slender, orange to red-brown, aging darker brown, rough. Buds narrowly to broadly ovoid, dark red-brown, to 1.2cm, slightly resinous. Leaves 2 per fascicle, spreading or ascending, persisting 3--8 years, 2--  ´ 0.7--2(--3)mm, twisted, yellow-green to dark green, all surfaces with fine stomatal lines, margins finely serrulate, apex blunt to acute or narrowly acuminate; sheath 0.3--0.6(--1)cm, persistent. Pollen cones ellipsoid to cylindric, 5--15mm, orange-red. Seed cones maturing in 2 years or variably serotinous, variably persistent, spreading to reflexed, often curved, nearly symmetric or variably asymmetric, lanceoloid to ovoid before opening, broadly ovoid to nearly globose when open, 2--6cm, tan to pale red-brown, lustrous, nearly sessile or on stalks to 1cm; apophyses nearly rhombic, variously elongate, cross-keeled, often mammillate toward outer cone base and on inside above middle; umbo central, depressed-triangular, prickle barely elongate to stubby or slender and to 6mm. Seeds compressed, obovoid; body ca. 5mm, red-brown, mottled with black, or all black; wing 10--14mm. 2 n =24 (variety not indicated).
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Large shrub, or small to medium-sized tree (sometimes large in cultivation); habit erect or spreading. Branches straight or somewhat twisted. Bark reddish brown, grey on surface, fissured and forming small plates. Shoots brown, glabrous. Buds cylindric or cylindric-ovoid, purplish brown, strongly resinous; scales tightly appressed. Lvs 2 per fascicle, (2.5)-3.5-6.5 cm × 0.8-1.5 mm, not or somewhat twisted, usually pointed forward, generally yellowish green; resin canals median; sheath very short after first year. ♂ strobili 5-15 mm long, cylindric or broadly cylindric. Conelets sessile; scales aristate. Mature cones long-persistent, often not opening until long after maturity, subsessile, usually directed downwards or backwards, 3-6 × 2-3.5 cm, ± broad-ovoid; base asymmetric or somewhat asymmetric; apophyses shining yellowish brown or brown before maturity, ± convex; umbo with short, slender, occasionally deciduous prickle. Seed wing asymmetric but almost oblong, c. 1 cm long.
A medium sized tree. It grows to 30 m high and can be 100 cm across the trunk. The trunk is often straight with a little taper. The branches are slender and short. The needles are in bundles of 2. They are 3-7 cm long. They are usually twisted and stiff and have a very sharp point. They do not spread apart and the edges have sharp teeth. The twigs are orange-brown. The seed cones are oval and 3-6 cm long. They are purplish-brown. They are stalkless and at right angles to the branch. They may point slightly backwards. They occur in small clusters at the nodes. The remain on the tree for 10-20 years and remain closed. The scales are thickened at the tips. They have a prickle which curves backwards. The cones open when exposed to the heat from a fire. The seeds are brown and mottled. They have a ridge on one side. They are 3 mm long and with a wing.
Tree to 20 m tall. Bark dark brown, scaly. Resting buds cylindrical, strongly resinous; scales closely appressed. Leaves twisted, in bundles of 2, finely toothed, 3-7 cm long, with 2 medial resin canals; stomatal lines on all sides, glossy, dark green; basal sheath 4-6 mm long. Female cones ovoid-conical, mostly asymmetric, 2-6 cm long, opening and shedding at maturity, or persisting for 1-few years; scales cuneate, with a slender, fragile mucro. Seeds with a well-developed wing.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality monoecy
Pollination anemogamy
Spread anemochory
Mature width (meter) 4.0 - 8.0
Mature height (meter) 15.0 - 19.85
Root system -
Rooting depth (meter) 0.75
Root diameter (meter) -
Flower color -
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It is a temperate plant. It grows on a wide range of soils. It can grow in wet depressions. It regenerates after fire. Botanical Gardens Hobart. Melbourne Botanical Gardens. It suits hardiness zones 5-9.
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Maritime fog forests, bogs, and dry foothills, growing in coastal dunes and sphagnum covered bogs to dry areas further inland; at elevations up to 600 metres.
Light 7-8
Soil humidity 3-7
Soil texture 3-6
Soil acidity 3-6
Soil nutriment -
Hardiness (USDA) 6-9

Usage

The needles are used to make tea. The soft inner bark can be eaten. The seeds can be eaten. The gum is chewed.
Uses beverage dye environmental use fiber forage gum material medicinal oil tea timber wood
Edible barks gums saps seeds
Therapeutic use Blood Medicine (bark), Cathartic (bark), Diuretic (bark), Tonic (bark), Tuberculosis Remedy (bark), Unspecified (bark), Venereal Aid (bark), Orthopedic Aid (bark), Cough Medicine (bark), Unspecified (sap), Burn Dressing (sap), Dermatological Aid (sap), Gastrointestinal Aid (sap), Misc. Disease Remedy (sap), Analgesic (sap), Antirheumatic (External) (sap), Cold Remedy (sap), Cough Medicine (sap), Orthopedic Aid (sap), Pulmonary Aid (sap), Throat Aid (sap), Analgesic (shoot), Gastrointestinal Aid (shoot), Tuberculosis Remedy (tuber), Antirheumatic (External) (unspecified), Dermatological Aid (unspecified), Heart Medicine (unspecified), Tuberculosis Remedy (unspecified), Eye Medicine (unspecified), Orthopedic Aid (unspecified), Stimulant (unspecified), Cold Remedy (unspecified), Cough Medicine (unspecified), Gastrointestinal Aid (unspecified), Throat Aid (unspecified), Disinfectant (unspecified), Misc. Disease Remedy (unspecified), Pediatric Aid (unspecified), Ache(Stomach) (unspecified), Boil (unspecified), Masticatory (unspecified), Skin (unspecified), Psoriasis (unspecified), Cough (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

The cones can remain unopen of the forest floor for many years. The cones open after fire and the seeds then quickly germinate.
Mode cuttings seedlings
Germination duration (days) 30 - 60
Germination temperacture (C°) 12 - 18
Germination luminosity -
Germination treatment soaking
Minimum temperature (C°) -15
Optimum temperature (C°) 23 - 30
Size -
Vigor -
Productivity -

Images

Habit

Pinus contorta habit picture by Mars (cc-by-sa)
Pinus contorta habit picture by Daniel Barthelemy (cc-by-nc)
Pinus contorta habit picture by Daniel Barthelemy (cc-by-nc)

Leaf

Pinus contorta leaf picture by tarko (cc-by-sa)
Pinus contorta leaf picture by tarko (cc-by-sa)
Pinus contorta leaf picture by Tom Batter (cc-by-sa)

Flower

Pinus contorta flower picture by Daniel Barthelemy (cc-by-nc)
Pinus contorta flower picture by Adam Van Straten (cc-by-sa)

Fruit

Pinus contorta fruit picture by Mathew March (cc-by-sa)
Pinus contorta fruit picture by Anna Pickering (cc-by-sa)
Pinus contorta fruit picture by Daniel Barthelemy (cc-by-nc)

Distribution

Pinus contorta world distribution map, present in Australia, France, New Zealand, and United States of America

Conservation status

Pinus contorta threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:30000492-2
WFO ID wfo-0000481330
COL ID 4J24Y
BDTFX ID 81075
INPN ID 458773
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Pinus inops Pinus macintoshiana Pinus contorta var. bolanderi Pinus contorta subsp. bolanderi Pinus contorta subsp. contorta Pinus contorta subsp. bolanderi Pinus contorta var. bolanderi Pinus contorta var. bolanderi Pinus bolanderi Pinus contorta

Lower taxons

Pinus contorta var. murrayana Pinus contorta var. latifolia Pinus contorta var. contorta