FLORA OF VIETNAM Fam. Urticaceae Pellionia sp. N.Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe Municipality, Pac Nga village, around point 22°54'59"N, 106°31'44"E, at elevation 700-750 m a.s.l. Secondary wet closed evergreen forest on steep rocky slopes of rocky ridges and mesae composed with light gray solid marble-like highly eroded crystalline limestone. Lithophytic herb up to 0.5 m tall on shady rocky slope. Flowers greenish, leaves deep green above, deep purple-violet below. Very common. Co-dominant of herbaceous forest stratum on low part of slopes and on rocky valleys. No HAL 5530 10 June 2004 Collectors: L.Averyanov, P.K.Loc, P.V.The, N.T.Vinh.