FLORA OF VIETNAM Fam. Urticaceae Pilea sp. Vietnam, Lang Son Prov., Вас Son Distr., Tan Tri Municipality, around Na Mau village. Highly degraded primary and secondary broad-leaved evergreen forest on very steep slopes and along tops of ridge composed with solid highly eroded crystalline gray marble-like limestone at elevation about 500-600 m a.s.l. Lithophytic herb on open mossy rocks. Flowers reddish, leaves deep green above. Common. No HAL 6710 14 March 2005. Collectors: L.Averyanov, N.T.Hiep, P.V.The, A.Averyanova.