Agathis atropurpurea
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Agathis atropurpurea |
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| B. Hyland |
Agathis atropurpurea is a species ofthe Araucaria family (Araucariaceae). It isnative tonortheast Queensland (Australia).
description
Agathis atropurpurea grows as an evergreen tree that can reach heights of up to 50 meters. The smooth to coarsely scaled trunk bark is reddish-violet over violet-brown and violet-black to brown or gray-brown and sometimes has a blue-green tint. The bark of the young branches is sometimes blue-green.
The buds are spherical in shape with a length of around 1.5 millimeters. The leaves are linear with a length 3-7 centimeters and a width of 0.5 to 2 centimeters, oval-lanceolate, oblong-elliptical shape to elliptical. They stand on a 1 to 2 millimeter long petiole. The upper end of the leaves is bluntly notched and the underside of the leaves is blue-green in color.
The male cones stand on a 2 to 3 millimeter long stem and are cylindrical in shape with a length of 0.9 to 1.6 centimeters and a thickness of 0.4 to 0.75 centimeters. They each contain two to five microsporophylls with two to five pollen sacs . The spherical, female cones are 3.5 to 5.5 inches long and just as thick. They consist of 100 to 150 cone scales and are olive green to blue-green in color as they mature. The light brown seeds are up to 1.2 centimeters long and have two cinnamon brown wings, the longer wing is up to 1.5 centimeters wide.
Occurrence and endangerment
The natural range of Agathis atropurpurea only includes the Bellenden Ker Range in northeast Queensland .
The species grows in subalpine rainforests at altitudes of 700 to 1600 meters. The annual precipitation is depending on the location between 2000 and 3000 mm. Agathis atropurpurea often grows there together with other tree species such as Balanops australiana , Ceratopetalum succirubrum , Ceratopetalum virchowii , Doryphora aromatica , Elaeocarpus ferruginiflorus , Flindersia bourjotiana , Syzygium cryptophlebia , Sundacarpus on pubescarus and Xanthostemon .
Agathis atropurpurea is classified as "low endangered" in the IUCN Red List . In the past, logging played an important role. In some parts of the distribution area there was a decline in populations , which may be due to an infestation with the fungus Phytophthora cinnamomi . The total population of Agathis atropurpurea is considered stable.
Systematics
Agathis atropurpurea is assigned to the Agathis section within the genus of the Kauri trees ( Agathis ) .
It was first described as Agathis atropurpurea in 1978 by Bernard Hyland in Brunonia , Volume 1, No. 1, Page 109.
swell
- Christopher J. Earle: Agathis atropurpurea. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed December 24, 2013 .
- Agathis atropurpurea. In: Flora of Australia Online. www.anbg.gov.au, accessed on December 24, 2013 (English).
Individual evidence
- ↑ a b c d e Christopher J. Earle: Agathis atropurpurea. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed December 24, 2013 .
- ↑ a b c d e Agathis atropurpurea. In: Flora of Australia Online. www.anbg.gov.au, accessed on December 24, 2013 (English).
- ↑ a b c Agathis atropurpurea in the endangered Red List species the IUCN 2013. Posted by: P. Thomas, 2010. Accessed December 24, 2013.
- ↑ Agathis atropurpurea at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed December 24, 2013.
