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 2017. Flowers with smell of rotten fruits, dark meat-purple. K. Averyanov 28 July 2017. Photos.