N. Viet Nam. Ha Giang Province, Quang Ba District, at Sin Suoi Ho village on east side of Sin Suoi Ho river. Degraded forest along north ridge slope. Limestone substrate and exposed rock outcrops at elev. about 850 m. 23°06′57′'N, 105°01′48′'E. In small patch of forest on rocks in deep shade. Tepal lobes white, labellum white medially, to brown to yellow on lobes, at rostellum labellum yellow and speckled red-brown. Rare.