FLORA OF VIETNAM. Fam. Convallariaceae. Tupistra sp. N. Vietnam, prov. Lai Chau, distr. Sin Ho, municipality Ta Ngau about. 30 km of Lai Chau town to the N (N 22°18' E 103°15'). Secondary open. wet mossy evergreen broadleaved forest with remnants of primary. elements on rocky steep slope of remnant karst limestone ridge at. elev. about 1650 m. Terrestrial and lithophyte forb up to 0.6 m hg on. shady steep slope. Very common. No NTH 2789   25 May 1999. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 6300-98). . Collectors: N.T.Hiep, P.H.Hoang, Averyanov L.