Lai Chau Prov., Tam Duong Distr., Ho Thau Community, Ho Thau village, around point 22°24′34″N 103°36′23″E.
Primary closed evergreen broad-leaved cloudy ericaceous forest on wet flat rocky river valley composed predominantly with shale at elev. about 2500 m a.s.l.
Terrestrial herb on shady rocky mossy slope. Flowers white. Locally common.
HAL 10394 5 Dec. 2006 Photo. Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.