Pinus bhutanica

Pinus bhutanica Grierson, D. G. Long & C. N. Page

Languages: English

Overview

General Description

Trees to 25 m or more; crown moderately open, not twiggy; branches spreading, drooping, sinuous; 1st-year branchlets conspicuously whitish bloomed, glandular pubescent; 2nd-year branchlets with thin, pale gray-green bark. Needles shed in 2nd year, 5 per bundle, pendulous, very slender, curved, triangular in cross section, 15-24 cm, adaxial surface grass green with no stomata, 2 abaxial surfaces conspicuously whitish bloomed, each with 4-7 stomatal lines, resin canals 3 or 4, adaxial 2 marginal or submarginal, abaxial 1 or 2 marginal or submarginal and always asymmetrically placed. Seed cones pedunculate 4.5-6 cm, elongate-cylindric, 12-20 cm long, 3-4 cm wide (5-7 cm wide when open). Seed scales rather elongate, thinly woody, base cuneate; apophyses rhombic, 1-1.5 cm long, 1.5-2.5 cm wide, keeled, apex subacute. Seeds brown, obovoid, compressed, 6-8 mm long, 4-5 mm wide; wing persistent, ca. 2 cm long, 0.7-1 cm wide.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Conservation

Threats

Pinus bhutanica is reported be least concern (Bachman et al., 2007).

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Ecology and Distribution

Distribution

Pinus bhutanica is occurring in SE Xizang, NW Yunnan of China, NE India, Bhutan.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Evolution

A new classification for the Pinus was proposed based on the cpDNA sequences (matK and rbcL), nuclear ribosomal DNA and morphology (Gernandt et al., 2005). In there, Pinus bhutanica belong to subgenus Strobus, section Strobus, subsection Strobus.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Habitat

Growing in forest; 1000-2500 m.

Author(s): Wen, Jun
Rights holder(s): Wen, Jun

Taxonomy

  • Pinus griffithii McClelland (synonym)

References

Bachman, S., Farjon A., Gardner M., & Thomas P. (2007).  Pinus bhutanica. (LuscombeD., ReynoldsC., Ed.).IUCN 2009. IUCN Red List of Threatened Species.
Gernandt, D. S., López G. G., García S. O., & Liston A. (2005).  Phylogeny and classification of Pinus. Taxon. 54,