Ha Giang Prov., Quan Ba Distr., Cao Ma Po Commune, Then Van 1 Village, around point 23.11410°N 104.84506°E steep rocky slopes composed with highly eroded limestone at elevation 1600–1700 m a.s.l. Primary evergreen broad-leaved and coniferous very humid forest. Herbaceous creeping epiphytic vine on mossy tree. Flowers white, corona purple. Not rare. 5 October 2019, L. Averyanov, Nguyen Sinh Khang, T. Maisak, VR 1336 (HN, LE01061187, LE01066874).