Thua Thien - Hue Prov., A Luoi Distr., Huong Nguyen municipality, around point 16°06′04”N 107°27′55”E.
Pristine primary broadleaved and mixed (with Dacrycarpus imbricatus) evergreen forest along mountain ridge composed with shale at elev. about 1000 m a.s.l.
Terrestrial fern. Very common, co-dominant od herbaceous stratum along ridges.