Thanh Hoa Prov., Thuong Xuan Distr., Bat Mot Municipality, Vin village, Xuan Lien Natural Reserve.
Remnants of primary broad-leaved evergreen humid forest on rocky, highly eroded, crystalline limestone at elevation 750-800 m a.s.l. around point 19°59′11.4″N 104°58′31.8″E.
Terrestrial herb to 1 m tall among open secondary shrubs along stream slpe in alluvial valley between limestone hills. Marginal flowers light violet, central flowers yellow. Not rare.
1 November 2013 CPC 6727 L.Averyanov, N.T.Hiep, N.S.Khang