Fam. Araceae. Acorus gramineus Soland. N. Vietnam, Lao Cai Prov., Van Ban Distr., Khanh Yen municipality, to the SW of Na Nheo village (in the vicinity of point 21°57'59'' N, 104°14'06'' E). Primary evergreen broad-leaved montane forest with Fokienia hodginsii (as emergent) along granite and quartzite slopes at elev. 1800 m a.s.l. Lithophytic herb on wet mossy rocks along stream. Inflorescences dull yellow. Very common. Usual co-dominant of lithophytic herb riparian community. No HAL 2620 21 March 2002 Coll. L. Averyanov, P.K. Loc, D.T. Doan (FFI Project). [Flora of Vietnam]