Quang Binh Prov., Minh Hoa Distr., Thuong Hoa municipality, environs of Mo O O O village, around point 17°39’36.7”N 105°54’55.7”E.
Remnants of short tall broad-leaved primary forest on rocky top of remnant mountain composed with highly eroded solid crystalline limestone at elevation about 612 m a.s.l.
Terrestrial and lithophytic creeping herb on shady rocky slope. Flowers greenish. Notcommon.