Picea sitchensis (Bong.) Carrière

Sitka spruce (en), Épicéa de Sitka (fr)

Species

Gymnosperms > Pinales > Pinaceae > Picea

Characteristics

Trees to 80m; trunk to   diam.; crown narrowly conic. Bark grayish brown to orange-brown. Branches somewhat drooping; twigs not pendent, rather stout, pinkish brown, glabrous. Buds reddish brown, 5--10mm, apex rounded. Leaves (1.2--)1.5--2.5(--3)cm, flattened or broadly triangular in cross section (abaxial surface rounded or slightly angular), rather rigid, blue-green to light yellow-green, abaxial surface darker green with stomatal bands very narrow or absent, adaxial surface glaucous with conspicuous stomatal bands separated by ridge, apex sharp-pointed. Seed cones 5--9(--10)cm; scales variable, elliptic to narrowly diamond-shaped, 15--22 ´ 12--16mm, rather rigid, margin at apex erose, apex extending 4--  beyond seed-wing impression. 2 n =24.
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A very large tree. It grows to 55 m high and the trunk can be 200 cm across. The trunk is very large and often has buttresses at the base. The leaves are straight and flattened. They are 20-30 mm long. They are keeled underneath and have a sharp point. They are yellowish-green on the upper surface. There are prominent lines of white dots underneath. The needles tend to be at right angles to the twigs. The cones are broad and like a cylinder. They are 5-10 cm long. The scales are yellow to light brown. They are thin and brittle. They are loose fitting. They are broadest near the middle. They are wavy, irregular and toothed along the edge. Cones open in autumn and shed in the months following. The seeds are reddish-brown.
Large tree, pyramidal when young; bark dark reddish brown, exfoliating in thin scales. Shoots light brown or yellowish brown when young, glabrous, grooved; lf pegs very prominent after lvs fall. Buds ovoid, glabrous, very thinly resinous. Lvs 1-2.3 cm long, strongly flattened, pungent-pointed, sweetly scented, ± sloping forwards on upper side of shoot; lower surface with c. 10 glaucous stomatal bands; upper surface shining, sometimes with 1-2 often broken rows of stomata. ♂ strobili yellow. Mature ♀ cones mostly 3.5-5.5 cm long, broadly cylindric-oblong; ovuliferous scales ovate-oblong, thin, flexible, becoming erose towards apex; bracts small, scarcely 1/2 as long. Seed with wing at least 3× length of seed body.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality monoecy
Pollination anemogamy
Spread anemochory
Mature width (meter) 6.25 - 7.0
Mature height (meter) 50.0 - 55.0
Root system -
Rooting depth (meter) 0.6
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It is a temperate plant. It grows in the foggy zone along the Pacific coast in Canada and USA. It grows inland for 150 km and to about 500 m altitude. It suits wetter places. It suits hardiness zones 4-8. Arboretum Tasmania. Mt Lofty Botanical Gardens.
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Moist, sandy, often swampy soils, occasionally on wet rocky slopes in the far north of its range. Alluvial soils from sea level to 300 metres, usually close to the coast.
Light 4-7
Soil humidity 5-7
Soil texture 1-6
Soil acidity 1-5
Soil nutriment -
Hardiness (USDA) 6-8

Usage

The sap or pitch is chewed like chewing gum. It can also be boiled. The inner bark is cooked and dried and stored for later use. The buds are used for food. The young shoots are eaten raw.
Uses environmental use fiber fuel gum material medicinal wood
Edible barks flowers gums seeds shoots
Therapeutic use Analgesic (bark), Antirheumatic (External) (bark), Gastrointestinal Aid (bark), Antirheumatic (Internal) (bark), Cold Remedy (bark), Cough Medicine (bark), Kidney Aid (bark), Throat Aid (bark), Unspecified (bark), Antifungal agents (bark), Antirheumatic (Internal) (leaf), Antirheumatic (External) (rhizome), Antirheumatic (External) (root), Antidiarrheal (root), Kidney Aid (root), Antirheumatic (External) (sap), Gastrointestinal Aid (sap), Laxative (sap), Venereal Aid (sap), Toothache (seed), Analgesic (shoot), Eye Medicine (shoot), Gastrointestinal Aid (shoot), Tuberculosis Remedy (tuber), Antirheumatic (External) (unspecified), Burn Dressing (unspecified), Ceremonial Medicine (unspecified), Dermatological Aid (unspecified), Disinfectant (unspecified), Diuretic (unspecified), Gastrointestinal Aid (unspecified), Heart Medicine (unspecified), Laxative (unspecified), Venereal Aid (unspecified), Tuberculosis Remedy (unspecified), Oral Aid (unspecified), Analgesic (unspecified), Cold Remedy (unspecified), Cough Medicine (unspecified), Other (unspecified), Blood Medicine (unspecified), Pediatric Aid (unspecified), Strengthener (unspecified), Unspecified (unspecified), Antidiarrheal (unspecified), Eye Medicine (unspecified), Panacea (unspecified), Hunting Medicine (unspecified), Swelling (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants are grown by seed.
Mode cuttings graftings seedlings
Germination duration (days) 30 - 60
Germination temperacture (C°) 12
Germination luminosity -
Germination treatment stratification
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Picea sitchensis habit picture by Dieter Albrecht (cc-by-sa)
Picea sitchensis habit picture by Chiodaroli Federico (cc-by-sa)
Picea sitchensis habit picture by Sylvain Piry (cc-by-sa)

Leaf

Picea sitchensis leaf picture by Laurence Chabalier (cc-by-sa)
Picea sitchensis leaf picture by Anne Maugé (cc-by-sa)
Picea sitchensis leaf picture by Barış (cc-by-sa)

Flower

Picea sitchensis flower picture by Christophe Gautreau (cc-by-sa)
Picea sitchensis flower picture by Dieter Albrecht (cc-by-sa)
Picea sitchensis flower picture by Dieter Albrecht (cc-by-sa)

Fruit

Picea sitchensis fruit picture by Silas Silas (cc-by-sa)
Picea sitchensis fruit picture by Dieter Albrecht (cc-by-sa)
Picea sitchensis fruit picture by Jutta Kemmer (cc-by-sa)

Distribution

Picea sitchensis world distribution map, present in Canada, France, New Zealand, and United States of America

Conservation status

Picea sitchensis threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:676986-1
WFO ID wfo-0000482639
COL ID 4HQ4Z
BDTFX ID 49318
INPN ID 113444
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Sequoia rafinesquei Pinus menziesii Picea menziesii Abies trigona Pinus sitchensis Picea grandis Abies merkiana Abies menziesii Picea sitchensis f. speciosa Abies falcata Picea falcata Pinus menziesii var. crispa Picea menziesii var. crispa Abies sitchensis Picea sitchensis