Araucaria nemorosa

Sapling

Araucaria nemorosa is a plant of the genus Araucaria (Araucaria ). It is a critically endangered endemic species belonging to New Caledonia island of Grande Terre.

Description

Araucaria nemorosa grows as evergreen tree that can reach heights of growth of up to 15 meters. The crown is shaped oval to conical. The branches are 8 to 12 millimeters thick.

In young specimens the relatively thick leaves are scale-like and bent inward. They are lanceolate. On older trees which imbricate overlapping, scale-like leaves are at a length of 6 to 10 mm and a width of 1.5 to 3 millimeters lanceolate with a pronounced midrib. The incurved tip is acute or obtuse.

The male cones are cylindrical in shape with a length of about 8 inches and a diameter of about 1.4 centimeters. They contain triangular Mikrosporophylle with six pollen sacs. The female cones are ovoid shaped with a length of around 11 centimeters and a diameter of 5-9 inches. The seed is about 3 inches long and has a wide - egg-shaped wings. The seedlings were from four cotyledons ( cotyledons ).

Occurrence

The natural range of Araucaria nemorosa situated in the outskirts of Port Boise. Further populations there should be between Cap and Cap Ndoua Reine Charlotte. None of the Beständ is more than two kilometers from the coast.

Araucaria nemorosa thrives at altitudes 20-185 meters. The annual rainfall is 2500-3000 mm. The species grows on soils that are on ultramafic rocks, especially peridotite develop. It occurs mainly in evergreen forests along the coast.

System

Araucaria nemorosa belongs to the section Eutacta within the genus Araucaria (Araucaria ). The first description as Araucaria nemorosa was made in 1969 by David John de Laubenfels in Travaux du Forestier Laboratorie de Toulouse, 1 ( 5-8 ) art. 5, page 1

Threats and conservation

Araucaria nemorosa is listed in the IUCN Red List as " critically endangered ". The total population comprises less than 5000 trees. The main hazard due to the mining and associated activities such as road construction and tailings storage are called. Furthermore, forest fires, the building of settlements and timber felling a risk; Recent studies show that one finds in all stocks evidence of inbreeding.

Swell

• Template: Internet resource / maintenance / access date not in ISO format Christopher J. Earle: Araucaria nemorosa. In: The Gymnosperm Database. www.conifers.org, December 12, accessed on 22 June, 2011 ( English).