Picea retroflexa

Picea retroflexa (Spruce Tapao Shan, Kit. 鳞 皮 云杉) is a species of spruce family of pine.
Contents
1 Taxonomic remarks
2 Distribution, ecology
3 Description
4 Use
5 Threats and Protection - 6 References - Taxonomic Remarks
In the Flora of China, Vol. 4: 28 (1999) this species was recorded as P. asperata var. asperata, while other (Chinese) scientific publications retained the species title or included it as a species of P. aurantiaca. Repeated study, which should include work with DNA sequences, is desirable.
Distribution, Ecology
Countries: China (Qinghai, Sichuan). It is a typical subalpine species, occurring between 3000 m and 4000 m above sea level, mainly on the northern slopes of acidic soils. The climate is continental alpine with low annual rainfall. At higher altitudes it grows in pure form or in admixture with Abies squamata, but at lower altitudes in admixture with Picea likiangensis var. rubescens, P. aurantiaca, Abies chensiensis and Tsuga chinensis.


It grows as an evergreen tree, up to 45 meters high and 1 meter in diameter. Gray-brown bark in furrows and irregularly divided into large, coarse plates. The smooth or slightly rusty bark of the branches is initially red or yellow-brown and turns brown or brownish in the second year. Slightly curved needles 1 to 2 cm wide and 0.1 to 0.2 cm flowering period from April to May. Cones oblong-elliptical in shape with a length of 5-16 cm and a diameter of 2.5 to 3.5 centimeters. Initially, green cones change color to ripen in September or October, turning from light brown to reddish brown. Elliptical, approximately 4 mm long seed has inverted ovoid wings about 11 mm long.
Use
Used in conjunction with other species in the area for the same purposes.
Threats and protection
Intensive mining and subalpine forests between 1950 and 1990, combined with the limited range of distribution of this taxon resulted in a significant population decline of over 50%. The Chinese government has recently introduced a ban on deforestation in western China. One subpopulation is found in the Juzhajigou Valley National Wildlife Refuge. Links to The Gymnosperm Database




Spruce Species
Picea abies · Picea alcoquiana · Picea asperata · Picea brachytyla · Picea breweriana · Picea chihuahuana · Picea crassifolia · Picea engelmannii · Picea farreri · Picea glauca · Picea glehnii · Picea jezoensis · Picea koraiensis · Picea koyamae · Picea likiangowis · Picea maraice neoveitchii · Picea obovata · Picea omorika · Picea orientalis · Picea pungens · Picea purpurea · Picea retroflexa · Picea rubren · Picea schchenkiana · Picea sitchensis · Picea smithiana · Picea spinulosa · Picea torus · Picea wilsonii.
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Picea retroflexa

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