Son La Prov., Thuan Chau Distr., Co Ma Municipality, Hua Ty village, Copia nature reserve, around point 21°20′07″N 103°35′07″E.
Remnants of broad-leaved (former coniferous with Fokienia hodginsii) primary and secondary forest on steep slopes and on tops of ridge composed with clay shale at elev. 1500-1600 m a.s.l.
Terrestrial herb in shady wet slope along stream. Flowers pink. Occasional.
HAL 9731 12 Nov. 2006 Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.