Araucaria hunsteinii
Araucaria hunsteinii
Araucaria hunsteinii is a plant of the genus Araucaria (Araucaria ). It is endemic in the northeast of the island of New Guinea.
- 5.1 Notes and references
Description
Appearance and bark
Araucaria hunsteinii grows as evergreen tree that can reach heights of growth of up to 85 meters and diameter at breast height of up to 3 meters. The growth habit is pyramidal; with increasing age, the crown opens increasingly more and more and flattens off. The dark brown, resinous bark is cracked and it scroll korkige parts from. The bark of the branches arranged in whorls is dark red.
There is Heterophyllie. On young trees the leaves are pfriemförmig. On older trees, the needle- shaped leaves with a length of 6 to 15 centimeters and a width of 1 to 2 centimeters are formed flat and lanceolate. The leaf veins are straight. To find the sheets piled on the ends of the branches. The seedlings have two seed leaves ( cotyledons ).
Cones and seeds
The male cones are cylindrically shaped with a length of 20 centimeters and a diameter of 1.8 to 2.5 centimeters. They contain lanceolate Mikrosporophylle. The female cones are ovate -oblong with a length of 15 to 20 centimeters and a diameter of about 12.5 inches. The triangular, relatively narrow seed has a length of about 2.5 inches and about 2.5 inches wide wings.
Occurrence and use
The natural range of Araucaria hunsteinii includes the Bulolo Valley in northeastern New Guinea. Further populations there should be in the Owen Stanley Mountains and the Hunstein Mountains.
In Papua New Guinea it is grown in plantations. The area of planted stands comprises about 8000 acres. This species was introduced for experimental purposes in Australia, Fiji and the Malay Peninsula. The trade name is " Klinki Pine ".
One finds Araucaria hunsteinii at altitudes 520-2100 m, where it forms mainly with various book plants mixed stands.
System
Araucaria hunsteinii is the only species of the section Intermedia within the genus Araucaria (Araucaria ). The first description was in 1889 as Araucaria hunsteinii by Karl Moritz Schumann in The Flora of Kaiser Wilhelm's Land, 11, Table 4, f 8
Synonyms for Araucaria hunsteinii K.Schum. include Araucaria schumanniana Warblers. and Titanodendron hunsteinii ( K.Schum. ) AVBobrov & Melikyan, Araucaria hunsteinii var klinkii ( Lauterb. ex Engl ) Silba, Araucaria klinkii Lauterb. ex Engl and Titanodendron klinkii ( Lauterb. ex Engl ) AVBobrov & Melikyan.
Threats and conservation
Araucaria hunsteinii is listed in the IUCN Red List as "low risk". It is noted, however, that a re-evaluation of risks is required. The main hazard reasons the exploitation of the forests for the production of high quality wood and use are mentioned as farmland. Furthermore, fire and feral pigs are a threat to the livestock population; whereas in Papua New Guinea exports of Araukarienholz is prohibited.
Swell
- Template: Internet resource / maintenance / access date not in ISO format Christopher J. Earle: Araucaria hunsteinii. In: The Gymnosperm Database. www.conifers.org, accessed 20 April 2011 (English).