Thanh Hoa Prov., Thuong Xuan Distr., Bat Mot Municipality, Duc village, Xuan Lien Natural Reserve. Primary broad-leaved evergreen forest along narrow ridge composed by shale at elevation 850-1150 m a.s.l. around point 20°01′50.4″N 104°57′21.0″E. Terrestrial herb in shady places along ridge edge. Common. 4 November 2013 CPC 6743 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, N.D.Thang, L.V.Tien
Plant grown from seeds flowered 30 May 2018. Flowers white, with light violet spots inside. Photos. L. Averyanov.