Pinus yunnanensis


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Pinus yunnanensis
Species Authority: Franch.
Infra-specific Taxa Assessed:
Common Name/s:
English Yunnan Pine
Taxonomic Notes: This species resembles and hybridizes with Pinus tabuliformis, forming the hybrid taxon Pinus × densata Mast. Some authors have considered it a subspecies of P. kesyia (or a variety of P. insularis = P. kesiya var. langbianensis). It would require detailed genetic (DNA) analysis to establish the true relationships of these taxa, and it seems more appropriate to retain this taxon at species rank at present. A form with very long, drooping needles up to 30 cm long was named Pinus yunnanensis var. tenuifolia and reported to occur in Guangxi and Guizhou, China, at 400-1,200 m a.s.l. It is recognized as distinct in Flora of China 4: 15 (1999), but the characters stated to differentiate it from var. yunnanensis seem to be rather similar with those of the latter instead. Here, following Farjon (2010), var. tenuifolia is considered synonymous with P. yunnanensis var. yunnanensis.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2013
Date Assessed: 2010-12-18
Assessor/s: Farjon, A., Christian, T. & Rushforth, K.
Reviewer/s: Thomas, P.
As this species is common and widespread, it is assessed as Least Concern.

Geographic Range [top]

Range Description: Recorded from SW China: S Sichuan, Yunnan, E Guizhou, and E Guangxi.
China (Guangxi, Guizhou, Sichuan, Yunnan)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Locally common.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Pinus yunnanensis grows from 400 m to 3,100 m a.s.l. in valleys and deep river gorges and on the high mountain slopes where it forms extensive forests. It is most abundant on dry and sunny slopes and it can locally reach to the tree line, forming an alpine shrub. It is adapted to survive on sites with infertile and shallow, rocky soils exposed to erosion. At high altitudes it can withstand severe frosts. It is most commonly gregarious in pure stands, but can be found growing with other pines, e.g. P. armandii, P. tabuliformis and P. kesiya, or with Keteleeria evelyniana, as well as with angiosperm trees and shrubs.
Systems: Terrestrial

Threats [top]

Major Threat(s): No specific threats have been identified for this species.

Conservation Actions [top]

Conservation Actions: Known from several protected areas and common in secondary forests.
Citation: Farjon, A., Christian, T. & Rushforth, K. 2013. Pinus yunnanensis. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <>. Downloaded on 23 April 2014.
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