FLORA OF VIETNAM. Fam. Urticaceae. Laportaea sp. N. Vietnam, prov. Cao Bang, distr. Nguyen Binh, municipality Thai Hoc,. about 5-6 km to ENE of Nguyen Binh town (N 22°39' E 105°57'). Secondary open shrubs on steep slopes of karst remnant limestone mesae. at 500-550 m elev. Terrestrial and lithophyte herb up to 1.5 m hg. Leaves below dirty-violet, urticate. Very common. Codominanthe of. shrub stratum in wet places. No CBL 1604   21 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.