Araucaria heterophylla (Salisb.) Franco

Norfolk pine (en), Araucarie de norfolk (fr), Araucarie de Norfolk (fr)

Species

Gymnosperms > Cupressales > Araucariaceae > Araucaria

Characteristics

Trees to 50 m tall; trunk to 1.5 m d.b.h.; trunk straight; bark dark gray, flaking; crown tower-shaped; branchlets spreading horizontally or drooping; lateral branchlets usually pinnatelyarranged, drooping. Leaves dimorphic: those of young trees and lateral branchlets loosely arranged, spreading openly, bright green, glaucous abaxially, subulate, usually laterallydepressed, upcurved, 6-12 mm, 3-or 4-ridged; those of mature trees and cone-bearing branchlets densely arranged, slightly openly spreading, broadly ovate or triangular-ovate, ±curved, 5-9 mm, widest at base, midvein obviously raised or not, apex obtuse. Pollen cones terminal, solitary. Seed cones subglobose, 8-12 × 7-11 cm, sometimes wider than long; apex ofbracts triangular, flattened, acute, upcurved. Seeds ellipsoid, slightly flattened, with a lateral wing.
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Tree to 70 m high with trunk to 2 m diam. Bark peeling in thin flakes. Branches horizontal; ultimate shoots horizontal or somewhat pendulous; shoots, including leaves, 7–10 mm diam. Juvenile leaves subulate, 1–1.25 cm long, incurved, transitional to mature leaves. Mature leaves in imbricate series encircling stems, broadly ovate, 4–7 mm long, 3–6 mm wide, minutely ciliolate, with slightly incurved, blunt, horny apex. Male cones solitary, 4–5 cm long, 1–1.3 cm diam. Female cones subglobose, 7.5–10 cm long, 8–10 cm diam.; scales 3.5–4 cm long, upper half with wings 7–10 mm wide, and an upturned, soft, apical spine 5–8 mm long. Seeds 2.5–3 cm long, 1.3–1.5 cm wide.
Large tree; bark dark grey-brown, peeling in thin flakes, deep pink beneath. Semi-juvenile lvs (on lowest branches of mature trees) somewhat flattened, 3-11 mm long, linear-subulate, acute, incurved. Adult lvs (from coning branches) ± flattened, 5-9 mm long, ovate or ovate-elliptic, ± obtuse, slightly keeled, strongly imbricate, incurved. ♂ strobili 3-5 cm long, narrow-cylindric. ♀ cones towards top of tree, 9-13 cm diam., broadly oblong-ellipsoid or subglobose, green at maturity; emergent part of scale (prickle) 6-10 mm long and c. 2 mm wide at 1/2 way to apex, pungent, directed forward.
An upright tree. It has a regular branching pattern. It grows to 30-70 m high and spreads 6-20 m across. The trunk can be 2 m wide. The bark peels in thin flakes. The branches are in rings of 4-7. The leaves are sickle shaped. They are 8-15 mm long by 1-2 mm wide. They are shorter on fertile branches. The leaves are crowded. They have an in-curved sharp point. The cones are 10 cm long and 12 cm wide.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality -
Pollination anemogamy
Spread -
Mature width (meter) 3.75 - 10.75
Mature height (meter) 22.6
Root system -
Rooting depth (meter) 0.9
Root diameter (meter) -
Flower color
Blooming months -
Fruit color
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It grows in coastal and subtropical regions. It is salt tolerant. It is wind tolerant. It can grow in deep sand. It suits hardiness zones 10-11. Arboretum Tasmania.
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Forests and open areas at all elevations from coastal to peaks.
An emergent tree of forests in lowland areas.
Light 5-8
Soil humidity 3-7
Soil texture 3-4
Soil acidity 2-7
Soil nutriment -
Hardiness (USDA) 9-11

Usage

This distinct species is perhaps the most famous of all the Norfolk Island plants, through cultivation throughout the world either in the open, or indoors (e.g. as a household plant with potted ornamental young trees) in regions affected by frost. Large trees feature in parks and large gardens, often appearing in a row lining coastal foreshore locations. In Australia, the Norfolk Island Pine has been a major signature tree of coastal towns from the earliest days of settlement, and trees were probably planted on the coast as landmarks for shipping (Spencer 1995: 151). The wood has been used to make furniture and wooden objects. The tree features on many postage stamps (e.g. a $5 Norfolk Island stamp issued in 1983), and is a symbol for Norfolk Island, appearing on its flag. Sometimes takes part as a Christmas Tree.
Uses afforestation environmental use food material medicinal ornamental wood
Edible seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Plants are grown from seed. They can also be grown from cuttings.
Mode cuttings seedlings
Germination duration (days) 30 - 60
Germination temperacture (C°) 12 - 15
Germination luminosity dark
Germination treatment -
Minimum temperature (C°) -7
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Araucaria heterophylla unspecified picture

Distribution

Araucaria heterophylla world distribution map, present in Australia, Brazil, China, New Zealand, and United States of America

Conservation status

Araucaria heterophylla threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:676669-1
WFO ID wfo-0000260389
COL ID G67T
BDTFX ID -
INPN ID 446365
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Araucaria heterophylla Eutassa heterophylla Pinus columbaria Abies columbaria Araucaria excelsa var. glauca Eutacta excelsa var. glauca Eutacta excelsa var. monstrosa Eutacta excelsa var. variegata-alba Eutacta excelsa var. aurea-variegata