Mexican white pine
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Mexican white pine ( Pinus ayacahuite ) |
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The Mexican White Pine ( Pinus ayacahuite ) is a plant species in the genus of pine ( Pinus ) from the family of Pinaceae (Pinaceae).
description
The Mexican Weymouth Pine is an evergreen tree that usually reaches heights of up to 25 meters, sometimes up to 45 meters at home. The bark is dark red-brown; it comes off in coarse scales or square plates; inside under the plates it is tinted light pink. The treetop of young trees is open and broadly conical. There are five of the needles; they are 13 to 15 cm long, thin and dark blue-green on young trees.
The male cones are about 0.8 cm tall and light green with a pink shiny tip; they stand in groups on an approximately 15 cm long branch section. The female cones stand in twos or threes at the end and upright on stems about 2 cm long. Young female cones are glossy green with blue-green and orange scales; ripe cones hang, are long, conical and 20 to 40 cm long.
The number of chromosomes is 2n = 24.
Distribution and location
The Mexican white pine is native to more southern Mexico , Guatemala , El Salvador, and Honduras . It grows in association with other pines and firs in cool, damp mountain areas at heights of (1500 to) 2000 to 3200 (to 3600) m. It is cultivated in Central and South America and in southern Africa, among others, but also thrives in cooler, oceanic climates. In Central Europe it is seldom planted and can almost only be seen in botanical collections.
Despite its tropical distribution, the Mexican Weymouth Pine is surprisingly cold-tolerant; from the culture in the US state of Pennsylvania as well as in Scotland specimens that have survived −30 ° C are reported. The largest tree in Germany (height 2012/2013: 20.5 m) is located in the Arboretum Sequoiafarm Kaldenkirchen .
Systematics
Pinus ayacahuite was first described in 1838 by Diederich Franz Leonhard von Schlechtendal in the magazine "Linnaea", Volume 12, Page 492. Schlechtendal took over the name that Christian Gottfried Ehrenberg had already given the species. Synonyms of the species are Pinus don-pedrii Roezl , Pinus hamata Roezl , Pinus ayacahuite var. Oaxacana Silba and Pinus ayacahuite subsp. neorecurvata Silba .
swell
Single references
- ^ Tropicos. [1]
- ^ BI Nyoka in: CAB International (Ed.): Pines of silvicultural importance (= CABI Publishing Series ). CABI Publications, Wallingford, Oxon 2002, ISBN 0-85199-539-X , pp. 9-13 . , limited preview in Google Book Search
- ↑ http://www.championtrees.de/5403879d900fef223/5403879d9c0fe7a01/index.html
- ↑ Linnaea 12, 1838: 492 .
- ↑ Rafaël Govaerts (ed.): Pinus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved April 24, 2019.
Web links
- Pinus ayacahuite in the Red List of Threatened Species of the IUCN 2006. Posted by: Conifer Specialist Group, 1998. Retrieved on 12 May, 2006.