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Spruce bent

Spruce bent ( lat. Picea retroflexa ) - a type of coniferous trees of the genus spruce ( Picea ), endemic to China .

Spruce bent
Scientific classification
Domain:Eukaryotes
Kingdom:Plants
The kingdom :Green plants
Department:Conifer
Class:Conifer
Order:Pine
Family:Pine
Rod:Spruce
View:Spruce bent
International Scientific Name

Picea retroflexa Mast. 1906

Security status
Status iucn3.1 en ru.svg Вымирающие виды
Endangered species
IUCN 3.1 Endangered : 34178

Content

Spread

The species is distributed on the territory of China in the west of Sichuan and southeast of Tibet . Occurs in the subalpine zone at an altitude of 3000–4000 (up to 4700) m above sea level , mainly on acidic soils. The area is located in a zone with a continental, relatively dry climate .

At the lower limit of the range is adjacent to Picea likiangensis var. rubescens , Picea aurantiaca , Abies chensiensis , Tsuga chinensis and Betula albosinensis ; at high altitudes usually grows along with Abies squamata .

Botanical description

Trees with one straight, round stem up to 150 cm thick and up to 45 m high. The crown of conical shape is formed by a set of straight, short, horizontal branches. The bark is rough, composed of small scales. Branches are short, thick, light or orange-brown, strongly ribbed and grooved. The needles are very tough, from light to grayish-green and bluish-green colors. The needles are linear, sharply pointed with sharp tips, radially oriented, curved forward, 12–18 mm long, 1.5–2 mm thick, tetrahedral with protruding ribs, with stomata in the form of paired stripes 2–3 above and 4–6 below . Pollen cones, 3-5 cm long, reddish-yellow after ripening. Seed cones are oval-oblong or cylindrical conical, 8-13 × 2-4 cm in size, purple-red before ripening, after ripening purple-brown. Seed scales obovoid shape, size 15-20 × 12-15 mm, the edge is slightly erosive or toothed, pressed to maturity, then bent back. Seeds ovate-oblong, 3-4 mm long, dark brown, with pale brown wing, size 10-15 × 5-7 mm.


Recent molecular studies [1] allow Picea retroflexa to be placed in common with Picea abies and other Asian spruce species, including Picea asperata , Picea crassifolia , Picea koraiensis , Picea koyamae , Picea meyeri and Picea obovata .

Taxonomy

Picea retroflexa Mast. , Journal of the Linnean Society . Botany. 37 (262): 420. 1906.

Synonyms

  • Picea asperata var. retroflexa (Mast.) WCCheng
  • Picea aurantiaca var. retroflexa (Mast.) CTKuan & LJZhou
  • Picea gemmata Rehder & EHWilson


Notes

  1. ↑ Ran, J.-H., Wei, X.-X. and Wang, X.-Q. Molecular phylogeny and biogeography of Picea (Pinaceae): Implications for phylogeographical studies using cytoplasmic haplotypes (Eng.) // Molecular Phylogenetics and Evolution. - 2006. - Vol. 41 , iss. 2 - P. 405-419 . - DOI : 10.1016 / j.ympev.2006.05.039 .

Links

  • Picea retroflexa (English) : information about the taxon on the site Tropicos .
  • Picea retroflexa (鳞 皮 云杉) description / Christopher J. Earle (ed.) // The Gymnosperm Database.
Source - https://ru.wikipedia.org/w/index.php?title=El_truded&oldid=99599262


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