Cao Bang Prov., Bao Lac Distr., Hong An municipality, Mi Lung village.
Primary broad-leaved and mixed humid evergreen forest on very steep slopes and along rocky ridge composed with solid crystalline highly eroded limestone at elevation 1500-1550 m a.s.l. around point 22°50′01.3″N 105°50′05.7″E.
Lithophytic acaulescent creeping herb on open mossy boulders. Flowers dark blue. Rare.
20 November 2014 CPC 7532 photos Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, T.Maisak, L.Osinovetz Flowered in cultivation in 29 December 2015. Flowers blue, light fragrant. Photos. L.Averyanov.