Tear jaw
| Tear jaw | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Teardrop pine ( Pinus wallichiana ) |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Pinus wallichiana | ||||||||||||
| Jacks. |
The Pinus wallichiana ( Pinus wallichiana ), also Wallich pine or Himalaya pine called, is a plant from the genus of pine trees ( Pinus ).
_at_Bhandakthathaatch_(8000_ft)_I_IMG_7363.jpg)
description
The teardrop pine is an evergreen tree that reaches heights of growth of up to 50 meters in its ancestral habitat and up to 35 meters in Europe . It has an open crown when young , which later becomes broad and branchy; in old age the crown is often damaged by snow breakage; the top often dies. There are five of the needles on short shoots and are bluish-gray in color (green outside, blue-white inside). They are limp, very thin, and mostly drooping; they become 18 to 20 centimeters long.
The banana-shaped cones are 20 to 36 cm long. When immature, they are still dark blue-gray and coated with clear or white resin; when ripe they are dark brown and white resinous. It is not recommended to touch these cones, as the sticky resin is difficult to remove from your hands.
The number of chromosomes is 2n = 24.
distribution
The teardrop pine comes from the eastern Himalayas from Afghanistan to Nepal and occurs there up to altitudes of 2500 meters. Their distribution area extends from northeast Afghanistan to northwest Yunnan .
Similar species
The teardrop pine is often confused with the Weymouth's pine , which also carries needles in clusters of five. The distinction is, however, certainly possible simply by the longer and hanging bluish-gray needles of the teardrop jaws. In addition, the pine cones are about twice as large.
Systematics
Pinus wallichiana was correctly described as a species by Albert Bruce Jackson in the journal "Bulletin of miscellaneous information, Royal Botanic Gardens Kew", volume 1938, page 85. Synonyms are Pinus excelsa Wall. ex D. Don nom. illegal. and Leucopitys excelsa Nieuwl.
hybrid
Pinus × schwerinii Fitschen is a hybrid between the teardrop pine and the Weymouth pine ( Pinus strobus ).
use
Because of its very rapid growth in youth (depending on the location, up to 70 cm in length growth per year can be expected), the teardrop pine was also planted in Germany as an experimental forestry. Due to its elegant appearance and loose open crown, it was introduced in Europe as an ornamental and park tree, but survives cold winters only in sheltered locations.
The large cones of the teardrop pine are often used as decoration, often by florists.
photos
Branches with cones
Detail on the branch of a lacrimal pine
literature
- Christopher J. Earle, last changes 2011: Pinus wallichiana at The Gymnosperm Database. (Section description and systematics).
Individual evidence
- ^ Tropicos. [1]
- ↑ a b c Rafaël Govaerts (Ed.): Pinus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved April 26, 2019.
- ↑ Botanical Garden of the University of Tübingen
Web links
- Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia )
- Pictures of the tear jaw
- Pinus wallichiana in the endangered Red List species the IUCN 2006. Posted by: Conifer Specialist Group, 1998. Retrieved on 12 May, 2006.