Quang Binh Prov., Minh Hoa Distr., Thuong Hoa municipality, environs of Mo O O O village, around point 17°38′00.4”N 105°55′57.9”E, Kalap Mountain.
Primary mixed and coniferous forest (with Dacrydium elatum and Dacrycarpus imbricatus) on very steep rocky slope and on rocky top of remnant mountain composed with highly eroded solid crystalline limestone at elevation 750-800 m a.s.l.
Terrestrial herb on very steep shady rocky slope near to mountain top and on top. Flowers light pink to almost white. Very common on and near mountain top only.
CPC 3716 25 July 2011 Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, N.Q.Vinh.