Austrocedrus
Encyclopedia
Austrocedrus is a genus
of conifer
belonging to the cypress family Cupressaceae
. It has only one species
, Austrocedrus chilensis, native to the Valdivian temperate rain forests
and the adjacent drier steppe-forests of central-southern Chile
and western Argentina
from 33°S to 44°S latitude. It is known in its native area as Ciprés de la Cordillera or Cordilleran Cypress, and elsewhere by the scientific name as Austrocedrus, or sometimes as Chilean Incense-cedar or Chilean Cedar. The generic name means "southern cedar".
It is a member of subfamily Callitroideae, a group of distinct southern hemisphere
genera associated with the Antarctic flora
. It is closely related to the New Zealand
and New Caledonia
n genus Libocedrus
, and some botanists treat it within this genus, as Libocedrus chilensis, though it resembles Libocedrus less than the other South American cypress genus Pilgerodendron
does.
It is a slow-growing, narrowly conical evergreen
tree
which grows from 10–24 m in height, with scale-like leaves
arranged in decussate pairs. The leaves are unequal in size, with pairs of larger (4–8 mm) leaves alternating with pairs of smaller (2–3 mm) leaves, giving a flattened shoot. Each leaf has a prominent white stomatal stripe along the outer edge. The cones
are 5–10 mm long, with four scales, two very small sterile basal scales and two large fertile scales; each fertile scale has two winged seed
s 3–4 mm long.
Cordilleran Cypress is found in the evergreen mountain forests of the Andes
, usually on drier sites within the rainforest, in open pure woods (where it is often locally dominant on the eastern slopes of the Andes in southwestern Argentina) or in association with Araucaria araucana
and Nothofagus
species.
It has been introduced to northwest Europe
and the Pacific Northwest
of North America
, where it is occasionally grown in botanical garden
s.
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of conifer
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...
belonging to the cypress family Cupressaceae
Cupressaceae
The Cupressaceae or cypress family is a conifer family with worldwide distribution. The family includes 27 to 30 genera , which include the junipers and redwoods, with about 130-140 species in total. They are monoecious, subdioecious or dioecious trees and shrubs from 1-116 m tall...
. It has only one species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
, Austrocedrus chilensis, native to the Valdivian temperate rain forests
Valdivian temperate rain forests
The Valdivian temperate rain forests are a temperate broadleaf and mixed-forest ecoregion located on the west coast of southern South America, lying mostly in Chile and extending into a small part of Argentina. It is part of the Neotropic ecozone. The forests are named after the city of Valdivia...
and the adjacent drier steppe-forests of central-southern 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...
and western Argentina
Argentina
Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...
from 33°S to 44°S latitude. It is known in its native area as Ciprés de la Cordillera or Cordilleran Cypress, and elsewhere by the scientific name as Austrocedrus, or sometimes as Chilean Incense-cedar or Chilean Cedar. The generic name means "southern cedar".
It is a member of subfamily Callitroideae, a group of distinct southern hemisphere
Southern Hemisphere
The Southern Hemisphere is the part of Earth that lies south of the equator. The word hemisphere literally means 'half ball' or "half sphere"...
genera associated with the Antarctic flora
Antarctic flora
The Antarctic flora is a distinct community of vascular plants which evolved millions of years ago on the supercontinent of Gondwana, and is now found on several separate areas of the Southern Hemisphere, including southern South America, southernmost Africa, New Zealand, Australia and New Caledonia...
. It is closely related to the 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...
n genus Libocedrus
Libocedrus
Libocedrus is a genus of five species of coniferous trees in the cypress family Cupressaceae, native to New Zealand and New Caledonia. The genus is closely related to the South American genera Pilgerodendron and Austrocedrus, and the New Guinean genus Papuacedrus, both of which are included within...
, and some botanists treat it within this genus, as Libocedrus chilensis, though it resembles Libocedrus less than the other South American cypress genus Pilgerodendron
Pilgerodendron
Pilgerodendron is a genus of conifer belonging to the cypress family Cupressaceae. It has only one species, Pilgerodendron uviferum, and is endemic to the Valdivian temperate rain forests and Magellanic subpolar forests of southern Chile and southwestern Argentina. It grows from 40 to 55°S in...
does.
It is a slow-growing, narrowly conical evergreen
Evergreen
In botany, an evergreen plant is a plant that has leaves in all seasons. This contrasts with deciduous plants, which completely lose their foliage during the winter or dry season.There are many different kinds of evergreen plants, both trees and shrubs...
tree
Tree
A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...
which grows from 10–24 m in height, with scale-like 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....
arranged in decussate pairs. The leaves are unequal in size, with pairs of larger (4–8 mm) leaves alternating with pairs of smaller (2–3 mm) leaves, giving a flattened shoot. Each leaf has a prominent white stomatal stripe along the outer edge. 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 5–10 mm long, with four scales, two very small sterile basal scales and two large fertile scales; each fertile scale has two winged 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 3–4 mm long.
Cordilleran Cypress is found in the evergreen mountain forests of the Andes
Andes
The Andes is the world's longest continental mountain range. It is a continual range of highlands along the western coast of South America. This range is about long, about to wide , and of an average height of about .Along its length, the Andes is split into several ranges, which are separated...
, usually on drier sites within the rainforest, in open pure woods (where it is often locally dominant on the eastern slopes of the Andes in southwestern Argentina) or in association with Araucaria araucana
Araucaria araucana
Araucaria araucana is an evergreen tree growing to tall with a trunk diameter. The tree is native to central and southern Chile, western Argentina and south Brazil. Araucaria araucana is the hardiest species in the conifer genus Araucaria...
and Nothofagus
Nothofagus
Nothofagus, also known as the southern beeches, is a genus of 35 species of trees and shrubs native to the temperate oceanic to tropical Southern Hemisphere in southern South America and Australasia...
species.
It has been introduced to northwest 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 the Pacific Northwest
Pacific Northwest
The Pacific Northwest is a region in northwestern North America, bounded by the Pacific Ocean to the west and, loosely, by the Rocky Mountains on the east. Definitions of the region vary and there is no commonly agreed upon boundary, even among Pacific Northwesterners. A common concept of the...
of North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
, where it is occasionally grown in botanical garden
Botanical garden
A botanical garden The terms botanic and botanical, and garden or gardens are used more-or-less interchangeably, although the word botanic is generally reserved for the earlier, more traditional gardens. is a well-tended area displaying a wide range of plants labelled with their botanical names...
s.