Cao Bang Prov., Bao Lac Distr., Hong An municipality, Mi Lung village.
Primary broad-leaved and mixed humid evergreen forest (with Podocarpus, Pinus, Fokienia and Tsuga) on very steep slopes and along rocky ridge composed with solid crystalline highly eroded limestone at elevation about 1500-1550 m a.s.l. around point 22°49′15.4″N 105°49′53″E.
Terrestrial herb to 3 m tall in open grassland on alluvial slope of limestone hill. Very common.