Lai Chau Prov., Sinh Ho Distr., Nam Ban Community, around point 22°20′41″N 103°10′07″E.
Riparian shrubs on rocky steep slopes and bluffs composed with shale limestone along Nam Na River valley from Muong Lay to Phong Tho at elev. about 225 m a.s.l.
Lithophytic sedge-like dense clustering herb on wet riparian rocks and bluffs along water line. Occasional.