Border area between Phieng Luong municipality (Ha Giang Prov., Bac Me Distr.) and Sinh Long municipalitiy (Tuen Quang Prov., Na Hang Distr.). Primary broad-leaved humid evergreen and mixed forest on very steep slopes and along rocky ridge composed with solid crystalline highly eroded limestone at elevation 1100-1170 m a.s.l. around point 22°38′24.3″N 105°20′21.3″E. Creeping terrestrial herb. Leaves velvety dark olive-brown to almost black with white median stripe. Occasional. 14 November 2014 CPC 7431b / TM 1143 Living plant only. Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, T.Maisak, L.Osinovetz Flowered in cult. in August 2016; sepals reddish-brown; petals hyaline greenish, brownish to apical part; hypochile and spur reddish-brown, epichile white; column reddish-brown, anther cap pale dull yellowish.