Abies beshanzuensis
Abies beshanzuensis
Abies beshanzuensis is a species of the pine family ( Pinaceae ). This in China endemic, endangered species is only known from a single, comprehensive five copies, Copse.
Description
Abies beshanzuensis grows as geradstämmiger tree and can reach heights of growth of up to 30 meters and diameter at breast height of up to 80 centimeters. The branches go horizontally from the trunk. The resinous buds are oval to conical shaped and colored yellow-brown. The needles are 1 to 4.2 inches long, 2.5 to 3.5 mm wide and have a notched needle tip. They are arranged like a comb on the branches and are twisted on the needle base. The Needles are glossy dark green colored while the needle base is paler. There are two white-colored Stomatabänder at the needle base.
Young trees have a smooth, light gray bark which later becomes scaly and lengthwise tears. The bark of the branches is light yellowish to yellowish brown. In some branches it turns gray black after three or four years. After the fall of the needles round to oval scars left behind.
The male cones are yellowish and are available at the branches of the branches. They are between 2 and 2.5 inches tall. The fertilization of the female cones takes place in May. The upright cones are 7-11 cm long and 3.5 to 4.5 inches thick. You are cylindrically shaped and colored to maturity in October-November brown yellow to light brown. The seed scales are 1.8 to 2.4 inches long and 2.5 to 3 centimeters wide. The egg-shaped and winged seeds are 6-9 mm long and 3-4 mm thick. With the wings they are 13 to 19 millimeters long.
Distribution and location
Abies beshanzuensis occurs only in southwestern Zhejiang in Baishanzu Shan. As the type was discovered in 1963 grew in their natural habitat only seven copies. Three were taken to the Botanical Garden of Beijing where she died a short time. 1988, the body of only three copies. In 1998, the natural holdings had increased again to five trees. The location of the last examples is a single group of trees which is located northeast of Qingyuan.
The species is a species of the maritime climate with warm summers and cold wet winters Represent occurs at altitudes 1500-1700 meters. The annual rainfall is around 1,250 mm.
In the group of trees some broadleaf deciduous trees such as maples come (Acer ), apparent chestnut ( Castanopsis ), the Shining beech ( Fagus lucida ), Lithocarpus hancei, Magnolia cylindrica and oak (Quercus ) ago. In addition to the deciduous trees and coniferous trees such as the Chinese Kopfeibe ( Cephalotaxus sinensis) come, the Chinese cryptomeria (Cryptomeria japonica var sinensis), the Chinese yew (Taxus sumatrana ) and the Taiwan Hemlock ( Tsuga chinensis) ago.
System
Abies is beshanzuensis assigned Firmae within the genus of fir (Abies ) of Section Momi and the lower section. The species is equated by some authors with Delavays Fir ( Abies delavayi ). The most closely related species seems to be the Momi fir ( Abies firma). Some authors Abies ziyuanensis is considered beshanzuensis as a variety of Abies.
Threats and conservation
As is only natural habitat are more five trees Abies beshanzuensis in the IUCN Red List as " critically endangered " out. The main hazard reasons the spread of agriculture and forest fires in conjunction with the low reproductive rate are called.