Pinus bhutanica Grierson, D. G. Long & C. N. Page
- genus Pinus L.
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.
Pinus bhutanica is reported be least concern (Bachman et al., 2007).
Ecology and Distribution
Pinus bhutanica is occurring in SE Xizang, NW Yunnan of China, NE India, Bhutan.
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.
Growing in forest; 1000-2500 m.
- Pinus griffithii McClelland (synonym)