Yunnan pine (Farjon 1984).
Syn: P. insularis var. yunnanensis (Franch.) Silba 1984; P. yunnanensis var. tenuifolia Cheng & Law 1975; P. insularis var. tenuifolia (Cheng & Law) Silba 1990 (Li 1997); P. tabulaeformis var. yunnanensis (Franchet) Shaw (Farjon 1984). Closely related species in subsection Pinus include: P. tabuliformis (adjunct range to N), P. kesiya (adjunct range to S) (Richardson and Rundel 1998), and (via cpDNA data) P. hwangshanensis, P. taiwanensis and P. thunbergii (Price et al. 1998).
Shoots: Can grow to the exceptional length of 35 cm in one season.
Leaves: In fascicles of 2-3, 15-20(30) cm long.
Cones: 3-7 cm long, light brown, situated laterally in groups of 2-5, erect on short peduncles, opening in the second summer of growth.
Cone scales: Purplish-brown on the inside. Apophysis keeled, ending in a short prickle on the umbo (Farjon 1984).
China: predominantly at 600-3000 m elevation on the high plateaus of Yunnan (Li 1997), but extending N into Sichuan, where it intergrades with P. tabuliformis, and S into N Burma, where it intergrades with P. kesiya. In recent times it has extended its range as competing broadleaf forests are logged (Farjon 1984, Li 1997, Richardson and Rundel 1998).
Hardy to Zone 8 (cold hardiness limit between -12.1°C and -6.7°C) (Bannister and Neuner 2001).
Last Modified 2017-12-29