FLORA OF VIETNAM Cupressaceae Calocedrus rupestris sp.nov. (Paratype)
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 650-700 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 10-20 m tall on rocky top of ridge. Common. Occasional co-dominant of fragments of coniferous forest on tops of ridges.