FLORA OF VIETNAM. Fam. Urticaceae. N. Vietnam, prov. Cao Bang, distr. Tra Linh, municipality Luu Ngoc,. vicinities of Lung Mu village (N 22°47' E 106°18'), about 14 km from. Cao Bang town to the N. Primary coniferous and mixed semideciduous. open forest (with Pseudotsuga brevifolia) along tops of limestone ridge. at 800 m alt. Epilite herb up to 0.6 m hg. Common dominante of herb. forest stratum. No CBL 1191   13 Dec. 1998. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 6300-98). . Collectors: Averyanov L., N.Q.Binh, N.T.Hiep, P.K.Loc, N.X.Tam.