Dwarf pine
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Dwarf pine ( Pinus pumila ) |
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| ( Pall. ) Rule |
The dwarf pine ( Pinus pumila ), also known as the Japanese dwarf pine , is a species of the pine ( Pinus ) genus .
description
The dwarf pine grows shrub-like and only reaches heights of 1 to 3, rarely up to 5 meters. The 4 to 6 cm long needles are five in short shoots . The cones are 2.5 to 4.5 cm long and contain large, nutty, wingless seeds.
The number of chromosomes is 2n = 24.
Occurrence
The natural distribution area of the dwarf pine stretches from northeastern Siberia via Kamchatka to Japan and northern China.
Systematics
The dwarf pine was discovered in 1784 by Peter Simon Pallas as a variety Pinus cembra var. Pumila in his work "Fl. Ross." Volume 1 (1), page 5. Only Eduard August von Regel gave it the rank of a species in 1859 in his Petersburg seed directory (Index seminum) page 23: Pinus pumila (Pall.) Regel . Synonyms of the species are Pinus cembra subsp. pumila (Pall.) Endl. , Pinus cembra var. Pygmaea Loudon or Pinus nana Lemée & H.Lév.
In the mountains of northern Japan, Pinus pumila occasionally hybridizes with Pinus parviflora ; these natural hybrids Pinus × hakkodensis Makino are larger than Pinus pumila ; they can reach heights of up to 8 to 10 meters.
literature
- Christopher J. Earle, last changes May 21, 2011: Pinus pumila 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 25, 2019.
Web links
- Pinus pumila in the endangered Red List species the IUCN 2006. Posted by: Conifer Specialist Group, 1998. Retrieved on 12 May, 2006.