FLORA OF VIETNAM. Fam. Urticaceae. Elatostema 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. Lithophyte forb up to 1 m hg on shady vertical. cliffs. Very common. No NTH 2783   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.