Picea farreri
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Picea farreri is a species ofthe pine family (Pinaceae). It is native to two river valleys in southern China and northern Myanmar .
description
Picea farreri grows as an evergreen tree that can reach heights of up to 35 meters. The open crown is broadly conical in shape. It is made up of branches with pendulous twigs that branch off straight or slightly downward from the trunk. The scaly bark is gray in color. The initially hairy bark of the twigs is olive-brown to pale orange-brown and becomes bald with age.
The slightly frosted, blue-green needles are 1.5 to 2.5 centimeters long, have a pointed tip and are flattened. The top is covered with a layer of white wax. On the underside of the leaf there are two stoma bands with five to six stomatal lines each. The needles are standing straight on the branches.
The male cones are conical-cylindrical in shape with a length of 2 to 2.5 centimeters and a thickness of about 3 millimeters. The cones are cylindrical to elliptical in shape with a length of 6 to 10 centimeters and a thickness of 3 to 4 centimeters and are on a stem that is 0 to 0.5 centimeters long. When ripe they are colored brown. The obovate seed scales are 0.8 to 1.2 centimeters long and between 1 and 1.6 centimeters wide. The outer, rounded edges of the scales are curved inwards. The seeds have a light brown wing with an irregular edge and become 1.6 inches long and 0.5 inches wide with this.
Distribution and location
The natural range of Picea farreri is in China and Myanmar . It includes the Nu Jiang valley in western Yunnan and the Fen Shui Ling valley in northern Myanmar .
Picea farreri thrives at altitudes of 2400 to 2700 meters. At least in Myanmar, the species grows on moist soils that have formed on limestone . The cool climate is characterized by heavy monsoon showers. The species forms small, pure stands within open forests.
Systematics
Picea farreri is assigned to the subgenus Picea and the section Omorika within the genus of the spruce trees ( Picea ) .
It was first described as Picea farreri in 1980 by Christopher Nigel Page and Keith D. Rushforth in Notes from the Royal Botanic Garden, Edinburgh , Volume 38 (1), page 130.
Hazard and protection
Picea farreri is classified as "Endangered" in the IUCN Red List . Logging and the associated loss of habitat are cited as the main threat . However, no statement can be made about the exact situation, as it is not possible to inspect stocks of the species in their natural habitat. It is also pointed out that a new risk assessment is necessary.
swell
- Christopher J. Earle: Picea farreri. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed on March 17, 2013 .
- 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 1999, ISBN 0-915279-70-3 , Picea farreri , pp. 32 (English, Picea farreri - online - this printed work is online with the same text).
Individual evidence
- ↑ a b c d e Christopher J. Earle: Picea farreri. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed on March 17, 2013 .
- ^ A b 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 1999, ISBN 0-915279-70-3 , Picea farreri , pp. 32 (English, Picea farreri - online - this printed work is online with the same text).
- ↑ Picea farreri at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed March 17, 2013.
- ↑ Picea farreri in the endangered Red List species the IUCN 2012. Posted by: Conifer Specialist Group, 1998. Accessed March 17, 2013.