Sichuan juniper

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Sichuan juniper
Juniperus saltuaria, Jiuzhaigou, Aba, Sichuan, China.jpg

Sichuan juniper ( Juniperus saltuaria )

Systematics
Order : Conifers (Coniferales)
Family : Cypress family (Cupressaceae)
Subfamily : Cupressoideae
Genre : Juniper ( Juniperus )
Section : Sabina
Type : Sichuan juniper
Scientific name
Juniperus saltuaria
Rehder & EHWilson

The Sichuan juniper ( Juniperus saltuaria ) is a plant from the family of the cypress family (Cupressaceae). It is native to central China .

description

The Sichuan juniper grows as an evergreen tree , rarely also as a shrub that can reach heights of up to 20 meters. The branches go straight or ascending from the trunk. The bent branches are 1 to 1.7 millimeters thick and have a square cross-section.

The Sichuan juniper has both needle-shaped and scale-like leaves , with the needles mainly found on young trees. The needle-shaped leaves are 4.5 to 6 millimeters long and have three whorls on the branches. They are furrowed on the underside and the tip of the leaf is pointed. The arched scale leaves are 1 to 2 millimeters long and have a triangular-diamond shape. At the base of the underside of the leaf there is an inconspicuous, spherical or egg-shaped leaf gland and the slightly depressed leaf tip is blunt.

The Sichuan juniper is single-sexed ( monoecious ). The male cones are approximately 2 millimeters long and almost spherical in shape. They contain six to eight microsporophylls which each carry two to three pollen sacs . The upright female cones are approximately oval to approximately spherical in shape with a diameter of 0.4 to 1 centimeter. At maturity they are bluish black to black in color. Each cone bears a seed. The furrowed and pitted seeds have a length of 3.5 to 7 millimeters and a width of 3 to 5 millimeters, irregularly spherical-egg-shaped.

Occurrence and endangerment

The natural range of the Sichuan juniper lies in central China in the provinces of southern Gansu , southeastern Qinghai , western Sichuan , eastern Xizang and northwestern Yunnan .

The Sichuan juniper thrives at altitudes of 2700 to 4600 meters, especially in forests and thickets.

The Sichuan juniper is classified as "not endangered" in the IUCN Red List . Since the last survey was carried out in 1998, however, it is pointed out that a new review of the risk is necessary.

Systematics

It was first described as Juniperus saltuaria in 1914 by Alfred Rehder and Ernest Henry Wilson in Plantae Wilsonianae. An enumeration of the woody plants collected in Western China for the Arnold Arboretum of Harvard University during the years 1907, 1908 and 1910 by EH Wilson edited by Charles Sprague Sargent , Volume 2 (1), pages 61-62. A synonym for Juniperus saltuaria Rehder & EHWilson is Sabina saltuaria (Rehder & EHWilson) WCCheng & WTWang .

swell

  • Christopher J. Earle: Juniperus saltuaria. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed January 1, 2013 .
  • Liguo Fu, Yong-fu Yu, Robert P. Adams & Aljos Farjon: Cupressaceae . Juniperus. In: Wu Zhengyi, Peter H. Raven & Hong Deyuan (eds.): Flora of China . Cycadaceae through Fagaceae. Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 1999, ISBN 0-915279-70-3 , Juniperus saltuaria , pp. 76 (English, Juniperus saltuaria - online - this printed work is online with the same text).

Individual evidence

  1. a b c d e Liguo Fu, Yong-fu Yu, Robert P. Adams & Aljos Farjon: Cupressaceae . Juniperus. In: Wu Zhengyi, Peter H. Raven & Hong Deyuan (eds.): Flora of China . Cycadaceae through Fagaceae. Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 1999, ISBN 0-915279-70-3 , Juniperus saltuaria , pp. 76 (English, Juniperus saltuaria - online - this printed work is online with the same text).
  2. Juniperus saltuaria in the endangered Red List species the IUCN 2012. Posted by: Conifer Specialist Group, 1998. Retrieved on January 1, 2013.
  3. Juniperus saltuaria at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed January 1, 2013.

Web links

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