FLORA OF VIETNAM Convallariaceae Tupistra wattii Dien Bien Prov., Tua Chua Distr., Sin Chai Municipality, around point 22°03’38”N 103°19’56”E. Primary humid evergreen broad-leaved forest on very steep rocky slopes and on tops of remnant mountain composed with highly eroded marble-like solid crystalline limestone at elevation 1350-1500 m a.s.l. Terrestrial and lithophytic herb to 0.5 m tall on shady rocky slope. Flowers light green. Very common. CPC 900 13 December 2010 Coll.: L.Averyanov, P.K.Loc, P.V.The, N.T.Vinh.