Picea wilsonii

Wilson's Spruce ( Picea wilsonii )

Wilson's Spruce ( Picea wilsonii ) is a species of the family (Pinaceae ). It is native to China.

Description

Wilson spruce grows as evergreen tree that can reach heights of growth of up to 50 meters and diameter at breast height of up to 1.3 meters. The crown is pyramidal. The gray Stammborke flakes off in irregular shaped pieces. The hairless, rarely at first hairy Two Grinde is first yellowish - green to yellowish- gray and light gray discolored with time to brownish- gray.

The yellowish- brown to brown winter buds are ovoid and not resinous. The straight or slightly curved needles are straight - rectangular shaped with a length of 0.8 to 1.3 centimeters and a width of 0.12 to 0.17 inches wide and have a quadrilateral cross - section. Your tip is pointed. On each side of the needles, there are four or five Stomatalinien.

Wilson spruce is monoecious - getrenntgeschlechtig ( monoecious ) and flowering time is in April. The pins are elongated ovoid shape, with a length 5 to 8 centimeters, and a thickness of from 2.5 to 4 centimeters. They are initially colored green and change color to maturity in October towards yellow-brown to light brown. The seed scales are obovate and 1.4 to 1.7 inches long and 1 to 1.4 inches wide. Your base runs to a wedge shape and its tip is pointed, rounded or truncated. The inverted egg-shaped seeds are about 3 to 4 millimeters long and have an upside - lanceolate, light brown wings, which is 8 to 11 millimeters long.

Distribution and location

The natural range of Wilson's Spruce is located in China. It includes where the provinces of Gansu, Hebei, Hubei, Nei Mongol, Qinghai, Shaanxi, Shanxi and Sichuan.

Wilson spruce grows at elevations from 1400 to 2800 meters. The species grows mainly in the mountains and in river valleys.

Picea wilsonii is " not endangered" than in the IUCN Red List. It is noted, however, that a re-examination of risk is necessary.

Use

Wilson spruce is planted in China as ornamental tree and is also used for reforestation. The wood is used as construction timber, for the production of poles and furniture as well as for the production of pulp.

System

Picea wilsonii of spruce (Picea ) the subgenus Picea, Picea section, the subsection Picea and serial Smithianai is allocated within the genus.

The first description was in 1903 as Picea wilsonii by Maxwell Tylden Masters in The Gardeners ' Chronicle, Series 3, Volume 33, page 56 synonyms for Picea wilsonii mast. are Picea mastersii Mayr and Picea watsoniana mast ..

Swell

• Christopher J. Earle: Picea wilsonii. In: The Gymnosperm Database. www.conifers.org, November 28, 2012, accessed on 25 May 2013 ( English).
• Liguo Fu, Nan Li, Thomas S. Elias & Robert R. Mill: Pinaceae. Picea. 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 in 1999, ISBN 0-915279-70-3, Picea wilsonii, p.29 ( this printed work is the same text online, Picea wilsonii - Online).