Abies ziyuanensis

Abies ziyuanensis is a species of the genus of fir (Abies ) in the pine family ( Pinaceae ). It occurs only in southern China and is therefore endemic. The species is occasionally performed as a variety of Abies beshanzuensis.

Description

Abies ziyuanensis grows as evergreen tree that can reach heights of growth of up to 30 meters and diameter at breast height of up to 90 centimeters. The branches go horizontally on long and straight trunk. Young trees have a smooth, grayish bark, which lightens the age something that makes furrows and in many different tearing large plates. The bark of the branches is strong at first light yellow to brownish- yellow. In the third or fourth year, she often turns gräulichschwarz and rips open. In the furrows are sometimes hair and you can find leaf scars.

The oval to conical buds are yellowish brown. They are surrounded by a thin, whitish layer of resin. The needles are 1 to 4.2 inches long and 2.5 to 3.5 millimeters wide. They are spirally arranged on the branches. At the needle bottom you will find two white Stomatabänder.

The flowering period covers the entire May The yellow male cones are about 2 inches tall and are at the leaf axils. The yellowish- green female cones are 5-10 mm in size and have a long stem. To maturity in October-November towards the pins change color to dark brown. Mature cones are cylindrical - elliptical in shape and are 7-12 inches long and 3.5 to 4.5 inches thick. The purple- gray seeds are 20 to 24 millimeters long with 10 to 14 millimeters relate to the spotted wings.

Distribution and location

Abies ziyuanensis is found only in China. There you can find them in the Southeast of Guangxi, southern Hunan and Jiangxi to the west at altitudes from 1400 to 1800 meters.

System

The species is assigned within the genus of fir (Abies ) of Section Momi and the subsection Holophyllae. It is not recognized by all authors as distinct species. So, for example, leads the Flora of China as they Abies beshanzuensis var ziyuanensis ( LK Fu & SL Mo) LK Fu & Nan Li More Synonyms for the species are Abies Abies fabri dayuanensis QX Liu and var ziyuanensis ( LK Fu & SL Mo ) Silba.

Threats and conservation

The species is listed in the IUCN Red List as " critically endangered ". It is noted, however, that a re-evaluation of risks is required. The main reason for the hazard, the low stock size associated with a slow rate of reproduction are called.

Swell

• Christopher J. Earle: Abies zhiyuanensis. In: The Gymnosperm Database. Accessed on 19 November 2010 (English ).
• Liguo Fu, Nan Li, Thomas S. Elias, Robert R. Mill: Abies beshanzuensis var ziyuanensis. In: Wu Zheng -yi, Peter H. Raven (eds.): Flora of China. Volume 4: Cycadaceae through Fagaceae, Science Press / Missouri Botanical Garden Press, Beijing / St. Louis 1999, ISBN 0-915279-70-3, page 50