FLORA OF VIETNAM. Fam. Urticaceae. Pellionia sp. N. Vietnam, prov. Lai Chau, about 50 km downstream along Black river. (Song Da), from Lai Chau town (N 22°03' E 103°09') to Nam Ma village. (distr. Sin Ho). Open shale and limestone rocks on steep slopes of the. river at elev. about 220 m. Terrestrial and lithophyte forb up to 0.3. m hg in wet shady place. Flowers yellowish. Not common. No NTH 2727   24 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.