Agathis labillardieri
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| Agathis labillardieri | ||||||||||||
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Agathis labillardieri is a species ofthe Araucaria family (Araucariaceae). It is endemic to the island of New Guinea .
description
Agathis labillardieri grows as an evergreen tree that can reach heights of up to 60 meters and a trunk circumference of up to 2 meters. The crown consists of upward branches. The branches of the second order are grooved while the branches have a cylindrical cross-section. The trunk bark is dark brown in color.
The leaves have a petiole 0.5 to 0.7 inches long and 0.2 to 0.3 inches thick. They are elongated-lanceolate to elliptical in shape with a length of 7.5 to 10 centimeters and a width of 1.8 to 3 centimeters. The tip of the leaf is blunt to more or less pointed. The underside of the leaf is shiny.
The male cones have a 0.1 to 0.2 centimeter long, sturdy stem and are 1.8 to 3 centimeters long and 1 to 1.5 centimeters thick with a broad, cylindrical shape. The spherical female cones are greenish in color and are 7.5 to 8.5 inches long and around 6 inches thick. They consist of angular cone scales. The seeds are about 1 inch long and about 0.8 inches wide. They have a clearly pronounced wing.
Occurrence and endangerment
The natural range of Agathis labillardieri is on the island of New Guinea . It occurs there both in western New Guinea, which belongs to Indonesia, and in the northwestern part of Papua New Guinea . The Sepik River and Mount Hagen in Papua New Guinea form the natural limit of distribution to Agathis robusta , a second Agathis species found in New Guinea .
Agathis labillardieri thrives at altitudes of 50 to 2000 meters. It usually grows in mountainous regions but also in swampy regions that have a tropical-perhumid climate . The species colonizes a variety of different soil types . They can be found on peat as well as on sandy, poorly to well-developed podsolized soils as well as on ultramafic soils , serpentine and limestone .
Agathis labillardieri is classified as "low endangered" in the IUCN Red List . The main reasons for endangerment are felling for wood production and the deforestation of the forests for the establishment of palm oil plantations . The total stock is considered to be in decline.
use
The wood of Agathis labillardieri is considered to be one of the most valuable of all wood species found in New Guinea.
Systematics
It was first described as Agathis labillardieri in 1900 by Otto Warburg in Monsunia, Contributions to the Knowledge of the Vegetation of the South and East Asian Monsoon Area , Volume 1, Page 183.
swell
- Christopher J. Earle: Agathis labillardieri. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed on January 11, 2015 .
Individual evidence
- ↑ a b c d e Christopher J. Earle: Agathis labillardieri. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed on January 11, 2015 .
- ↑ a b c agathis labillardieri in the endangered Red List species the IUCN 2014 Posted by: A. Farjon, 2012. Accessed January 11, 2015.
- ↑ Agathis labillardieri at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 11, 2015.
- ↑ Agathis labillardieri. In: The Plant List. www.theplantlist.org, accessed on January 11, 2015 .