FLORA OF VIETNAM. Fam. Urticaceae. Pellionia sp. Ophyorrhyza sp. N. Vietnam, prov. Lao Cai, distr. Than Uyen, municipality Ho Mit (N. 22°06' E 103°52'). Elevation to Mang Han San quartzite peak by SW. slope from Ban Thao village (SSW macroslope of Hoang Lien Son ridge). Primary wet evergreen broadleaved forest on very steep rocky slope at. 2100 m elev. Terrestrial and lithophyte forb 10-20 cm hg on steep wet. slopes of stream canyon. Very common. No NTH 2876   21-22 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.