Araucaria hunsteinii
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Araucaria hunsteinii |
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| K. Schum. |
Araucaria hunsteinii is a species of the genus Araucaria ( Araucaria ). It is endemic to the northeast of the island of New Guinea .
description
Appearance and bark
Araucaria hunsteinii grows as an evergreen tree that can reach heights of growth of up to 85 meters and diameters of up to 3 meters at chest height . The growth habit is pyramidal; with increasing age the crown opens and flattens out more and more. The dark brown, resinous bark is cracked and corky parts are peeling off. The bark of the whorled twigs is dark red.
leaves
There is heterophyllia . The leaves are awl-shaped on young trees . On older trees, the needle-shaped leaves are 6 to 15 centimeters long and 1 to 2 centimeters wide and are flat and lanceolate in shape. The leaf veins run in a straight line. The leaves are found in clusters at the ends of the branches. The seedlings have two seed leaves ( cotyledons ).
Cones and seeds
The male cones are cylindrical in shape with a length of 20 centimeters and a diameter of 1.8 to 2.5 centimeters. They contain lanceolate microsporophylls . The female cones are oval-elongated with a length of 15 to 20 centimeters and a diameter of about 12.5 centimeters. The triangular, relatively narrow seed has a length of around 2.5 centimeters and a wing that is around 2.5 centimeters wide.
Occurrence and use
The natural range of Araucaria hunsteinii includes the Bulolo Valley in northeast New Guinea . There are said to be other deposits in the Owen Stanley Mountains and the Hunstein Mountains .
In Papua New Guinea it is grown in plantations . The area of the planted stands covers around 8,000 hectares. 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 from 520 to 2,100 meters, where it forms mainly with various book plants mixed stands.
Systematics
Araucaria hunsteinii is the only species of the Intermedia section within the genus of Araucaria ( Araucaria ). It was first described as Araucaria hunsteinii in 1889 by Karl Moritz Schumann in Die Flora von Kaiser Wilhelms Land , 11, plate 4, f. 8th.
Synonyms for Araucaria hunsteinii K.Schum. are among others Araucaria schumanniana Warb. 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 .
Hazard and protection
Araucaria hunsteinii is listed as "low risk" on the IUCN Red List . It is pointed out, however, that a new check of the risk is necessary. The exploitation of the forests for the extraction of high-quality wood and for use as arable land is named as the main risk factor. Furthermore, fire and feral pigs pose a threat to the population. In Papua New Guinea, the export of araucaria wood is prohibited.
swell
- Christopher J. Earle: Araucaria hunsteinii. In: The Gymnosperm Database. www.conifers.org, accessed April 20, 2011 .
Individual evidence
- ↑ a b c d e Christopher J. Earle: Araucaria hunsteinii. In: The Gymnosperm Database. www.conifers.org, accessed April 27, 2011 (English).
- ↑ a b c Araucaria hunsteinii in the endangered Red List species the IUCN 2010. Posted by: Conifer Specialist Group, 1998. Accessed April 20, 2011th
- ↑ Barry Conn & Kipiro Damas: Guide to trees of Papua New Guinea : Data sheet at PNGTreesKey - Araucaria hunsteinii K.Schum.
- ↑ Araucaria hunsteinii. In: TROPICOS. www.tropicos.org, accessed April 27, 2011 (English).
