Ha Giang Prov., Bac Me Distr., Thuong Tan municipality. Primary broad-leaved humid evergreen forest on very steep slopes and along rocky ridge composed with solid crystalline highly eroded limestone at elevation 1200-1285 m a.s.l. around point 22°38′19.0″N 105°17′06.5″E. Terrestrial herb on mountain shady slope. Old flowers dull light brownish-gray. Locally common. 16 November 2014 CPC 7491 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, T.Maisak, L.Osinovetz Fl. in cult. in July-August 2016. Flowers with smell of rotten fruits, dark meat-purple. K. Averyanov 28 July 2016. Photos.