Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Primary broad-leaved evergreen and mixed (with Pinus kwangtungensis) humid forest on very steep rocky slopes on solid, marble-like highly eroded limestone at elevation 900–1200 m a.s.l. on steep rocky slope. Clustering appressed epiphyte on mossy trees on rocky mossy mountain top. Flowers white to light yellowish or pinkish with purple veins, lip dark purple. Rare.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL3075.