Araucaria heterophylla
Encyclopedia
Araucaria heterophylla (synonym A. excelsa) is a distinctive conifer
, a member of the ancient and now disjointly distributed family Araucariaceae
. As its vernacular name Norfolk Island Pine implies, the tree is endemic
to Norfolk Island
, a small island in the Pacific Ocean
between Australia
, New Zealand
and New Caledonia
. The genus Araucaria
occurs across the South Pacific, especially concentrated in New Caledonia (about 700 km due north of Norfolk Island) where 13 closely related and similar-appearing species are found. It is sometimes called a 'star pine', due to its symmetrical shape as a sapling, although it is not a true pine
.
s that can contort most other species.
The leaves
are awl-shaped, 1-1.5 cm long, about 1 mm thick at the base on young trees, and incurved, 5–10 mm long and variably 2–4 mm broad on older trees. The thickest, scale-like leaves on coning branches are in the upper crown. The cones
are squat globose, 10–12 cm long and 12–14 cm diameter, and take about 18 months to mature. They disintegrate at maturity to release the nut
-like edible seed
s.
The scientific name heterophylla ("different leaves") derives from the variation in the leaves between young and adult plants.
The first European known to have sighted Norfolk Island, and thus the Norfolk Island pine, Captain James Cook, in 1774, on his second voyage to the South Pacific on HMS Resolution
. He named the island after the Duchess of Norfolk, wife of Edward Howard, 9th Duke of Norfolk (1685–1777). The Duchess was dead at the time of the island's sighting by Cook, but Cook had set out from England in 1772 and could not have known of her May 1773 death. Cook landed on Norfolk Island, and reported on the presence of large quantities of tall, straight trees which appeared to be suitable for use as masts
and yards
for sailing ships. However, when the island was occupied in 1788 by transported convicts from Britain, it was found that Norfolk Island Pine was not resilient enough for these uses and the industry was abandoned.
In the late 1950s a trial shipment of Norfolk Pine logs was sent to Sydney plywood manufacturers in the hope of developing a timber export industry for the Island. Although the plywood companies reported excellent results the industry was deemed not sustainable by the Norfolk Island Advisory Council who decided to reserve local timber production for use on the Island. The timber is good for woodturning
, and is extensively used by Hawaiian craftspeople.
, New Zealand
, southern Florida
, coastal California
, south Texas
, Hawaii
, coastal Chile
, Honduras
, South Africa
and some cities of Brazil
. Many of the "Norfolk Island pines" growing in Hawaii, including their descendents growing as potted ornamentals on the U.S. mainland, are actually Cook Island pines, the two species having been confused when introduced.
It grows well in deep sand, as long as it receives reliable water when young. This, and its tolerance of salt
and wind, makes it ideal for coastal situations.
Young trees are often grown as houseplant
s in areas where the winters are too cold for them to grow outside (they will not, for example, survive outdoors in most of the United States
or Europe
), and are sometimes used as Christmas tree
s. It will not survive in areas subject to prolonged cold. Large numbers of Norfolk Island Pines are produced in South Florida for the houseplant industry. The bulk of these are shipped to grocery stores, discount retailers and garden centers during November. Many of these are sprayed with a light coating of green paint prior to sale to increase their eye appeal.
Even in Florida, these trees are subject to frost
damage and produce multiple stems with weakly attached trunks - in the 2004 hurricane season
, many of these trees failed under the 160 km/h winds. As a result some coastal communities (e.g. Vero Beach) prohibit their use as a tree in local landscape plan approvals because of the danger posed by falling trunks.
Some people may experience a strong allergic reaction if they touch the leaves.
Pinophyta
The conifers, division Pinophyta, also known as division Coniferophyta or Coniferae, are one of 13 or 14 division level taxa within the Kingdom Plantae. Pinophytes are gymnosperms. They are cone-bearing seed plants with vascular tissue; all extant conifers are woody plants, the great majority being...
, a member of the ancient and now disjointly distributed family Araucariaceae
Araucariaceae
Araucariaceae, commonly referred to as araucarians, is a very ancient family of coniferous trees. It achieved its maximum diversity in the Jurassic and Cretaceous periods, when it was distributed almost worldwide...
. As its vernacular name Norfolk Island Pine implies, the tree is endemic
Endemic (ecology)
Endemism is the ecological state of being unique to a defined geographic location, such as an island, nation or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, all species of lemur are endemic to the...
to Norfolk Island
Norfolk Island
Norfolk Island is a small island in the Pacific Ocean located between Australia, New Zealand and New Caledonia. The island is part of the Commonwealth of Australia, but it enjoys a large degree of self-governance...
, a small island in the Pacific Ocean
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...
between Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
, New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...
and New Caledonia
New Caledonia
New Caledonia is a special collectivity of France located in the southwest Pacific Ocean, east of Australia and about from Metropolitan France. The archipelago, part of the Melanesia subregion, includes the main island of Grande Terre, the Loyalty Islands, the Belep archipelago, the Isle of...
. The genus Araucaria
Araucaria
Araucaria is a genus of evergreen coniferous trees in the family Araucariaceae. There are 19 extant species in the genus, with a highly disjunct distribution in New Caledonia , Norfolk Island, eastern Australia, New Guinea, Argentina, Chile, and southern Brazil.-Description:Araucaria are mainly...
occurs across the South Pacific, especially concentrated in New Caledonia (about 700 km due north of Norfolk Island) where 13 closely related and similar-appearing species are found. It is sometimes called a 'star pine', due to its symmetrical shape as a sapling, although it is not a true pine
Pine
Pines are trees in the genus Pinus ,in the family Pinaceae. They make up the monotypic subfamily Pinoideae. There are about 115 species of pine, although different authorities accept between 105 and 125 species.-Etymology:...
.
Morphology
The trees grow to a height of 50–65 m, with straight vertical trunks and symmetrical branches, even in the face of incessant onshore windWind
Wind is the flow of gases on a large scale. On Earth, wind consists of the bulk movement of air. In outer space, solar wind is the movement of gases or charged particles from the sun through space, while planetary wind is the outgassing of light chemical elements from a planet's atmosphere into space...
s that can contort most other species.
The leaves
Leaf
A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....
are awl-shaped, 1-1.5 cm long, about 1 mm thick at the base on young trees, and incurved, 5–10 mm long and variably 2–4 mm broad on older trees. The thickest, scale-like leaves on coning branches are in the upper crown. The cones
Conifer cone
A cone is an organ on plants in the division Pinophyta that contains the reproductive structures. The familiar woody cone is the female cone, which produces seeds. The male cones, which produce pollen, are usually herbaceous and much less conspicuous even at full maturity...
are squat globose, 10–12 cm long and 12–14 cm diameter, and take about 18 months to mature. They disintegrate at maturity to release the nut
Nut (fruit)
A nut is a hard-shelled fruit of some plants having an indehiscent seed. While a wide variety of dried seeds and fruits are called nuts in English, only a certain number of them are considered by biologists to be true nuts...
-like edible seed
Seed
A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant...
s.
The scientific name heterophylla ("different leaves") derives from the variation in the leaves between young and adult plants.
Uses
HMS Resolution
Several ships of the Royal Navy have borne the name HMS Resolution. However, the first English warship to bear the name Resolution was actually the first rate Prince Royal , which was renamed Resolution in 1650 following the inauguration of the Commonwealth, and continued to bear that name until...
. He named the island after the Duchess of Norfolk, wife of Edward Howard, 9th Duke of Norfolk (1685–1777). The Duchess was dead at the time of the island's sighting by Cook, but Cook had set out from England in 1772 and could not have known of her May 1773 death. Cook landed on Norfolk Island, and reported on the presence of large quantities of tall, straight trees which appeared to be suitable for use as masts
Mast (sailing)
The mast of a sailing vessel is a tall, vertical, or near vertical, spar, or arrangement of spars, which supports the sails. Large ships have several masts, with the size and configuration depending on the style of ship...
and yards
Yard (sailing)
A yard is a spar on a mast from which sails are set. It may be constructed of timber, steel, or from more modern materials, like aluminium or carbon fibre. Although some types of fore and aft rigs have yards , the term is usually used to describe the horizontal spars used with square sails...
for sailing ships. However, when the island was occupied in 1788 by transported convicts from Britain, it was found that Norfolk Island Pine was not resilient enough for these uses and the industry was abandoned.
In the late 1950s a trial shipment of Norfolk Pine logs was sent to Sydney plywood manufacturers in the hope of developing a timber export industry for the Island. Although the plywood companies reported excellent results the industry was deemed not sustainable by the Norfolk Island Advisory Council who decided to reserve local timber production for use on the Island. The timber is good for woodturning
Woodturning
Woodturning is a form of woodworking that is used to create wooden objects on a lathe . Woodturning differs from most other forms of woodworking in that the wood is moving while a stationary tool is used to cut and shape it...
, and is extensively used by Hawaiian craftspeople.
Cultivation
The distinctive appearance of this tree, with its widely spaced branches and symmetrical, triangular outline, has made it a popular cultivated species, either as a single tree or in avenues. When the tree reaches maturity, the shape may become less symmetrical. As well as in its native Norfolk Island, it is widely planted in AustraliaAustralia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
, New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...
, southern Florida
Florida
Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...
, coastal California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...
, south Texas
Texas
Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...
, Hawaii
Hawaii
Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...
, coastal Chile
Chile
Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...
, Honduras
Honduras
Honduras is a republic in Central America. It was previously known as Spanish Honduras to differentiate it from British Honduras, which became the modern-day state of Belize...
, South Africa
South Africa
The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...
and some cities of Brazil
Brazil
Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...
. Many of the "Norfolk Island pines" growing in Hawaii, including their descendents growing as potted ornamentals on the U.S. mainland, are actually Cook Island pines, the two species having been confused when introduced.
It grows well in deep sand, as long as it receives reliable water when young. This, and its tolerance of salt
Salinity
Salinity is the saltiness or dissolved salt content of a body of water. It is a general term used to describe the levels of different salts such as sodium chloride, magnesium and calcium sulfates, and bicarbonates...
and wind, makes it ideal for coastal situations.
Young trees are often grown as houseplant
Houseplant
A houseplant is a plant that is grown indoors in places such as residences and offices. Houseplants are commonly grown for decorative purposes, positive psychological effects, or health reasons such as indoor air purification...
s in areas where the winters are too cold for them to grow outside (they will not, for example, survive outdoors in most of the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
or Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
), and are sometimes used as Christmas tree
Christmas tree
The Christmas tree is a decorated evergreen coniferous tree, real or artificial, and a tradition associated with the celebration of Christmas. The tradition of decorating an evergreen tree at Christmas started in Livonia and Germany in the 16th century...
s. It will not survive in areas subject to prolonged cold. Large numbers of Norfolk Island Pines are produced in South Florida for the houseplant industry. The bulk of these are shipped to grocery stores, discount retailers and garden centers during November. Many of these are sprayed with a light coating of green paint prior to sale to increase their eye appeal.
Even in Florida, these trees are subject to frost
Frost
Frost is the solid deposition of water vapor from saturated air. It is formed when solid surfaces are cooled to below the dew point of the adjacent air as well as below the freezing point of water. Frost crystals' size differ depending on time and water vapour available. Frost is also usually...
damage and produce multiple stems with weakly attached trunks - in the 2004 hurricane season
2004 Atlantic hurricane season
The 2004 Atlantic hurricane season officially began on June 1, 2004, and lasted until November 30, 2004. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin...
, many of these trees failed under the 160 km/h winds. As a result some coastal communities (e.g. Vero Beach) prohibit their use as a tree in local landscape plan approvals because of the danger posed by falling trunks.
Some people may experience a strong allergic reaction if they touch the leaves.