Quang Binh Prov., Minh Hoa Distr., Thuong Hoa municipality, environs of Mo O O O village, around point 17°39′21.1”N 105°54′41.7”E.
Closed broad-leaved evergreen primary forest on steep rocky slope of middle part of remnant mountain composed with highly eroded solid crystalline limestone at elevation 400-450 m a.s.l. (mt summit at about 570 m).
Terrestrial fern in shady places. Very common.
CPC 3877 28 July 2011 Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, N.Q.Vinh.