FLORA OF VIETNAM. Fam. Urticaceae. Elatostema sp. N. Vietnam, prov. Ha Giang, distr. Dong Van, municipality Dong Van,. vicinities of Dong Van town (N 23°16' E 105°22'). Secondary shrubs on. steep slopes and bluffs of karst remnant limestone ridges at 1100 m. elev. Lithophyte shrublet up to 1 m hg on mossy shady rocks. Very. common. No CBL 1708   27 April 1999. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 6300-98). . Collectors: P.K.Loc, P.H.Hoang, Averyanov L.