N.Vietnam, Bac Kan Prov., Na Ri Distr., Liem Thuy Municipality, village Na Bo, around point 21°56′44′'N, 106°05′09′'E, at elevation 300-700 m a.s.l.
Primary broad-leaved evergreen closed wet forest on very steep slopes and cliffs of rocky ridges and mesae composed with white solid marble-like crystalline limestone.
Tree up to 30 m tall and 1.5 m in diam, about 500 years old (on rings calculation) on tops of ridge. Common. Occasional co-dominant of fragments of coniferous forest on tops of ridge. Cones erect about 15 cm long and 3-4 cm in diam. HAL 4925 27 May 2004