FLORA OF VIETNAM Urticaceae Pilea sp.? Dien Bien Prov., Muong Cha Distr., Mua Ngai Municipality, around point 21°52’19”N 103°10’01”E. Remnants of primary evergreen broad-leaved forest on very steep rocky slopes and on tops of remnant mountain composed with highly eroded marble-like solid crystalline limestone at elevation 1150-1250 m a.s.l. Pendent lithophytic herb on vertical shady mossy cliffs. Locally abundant. CPC 1048 18 December 2010 Coll.: L.Averyanov, P.K.Loc, P.V.The, N.T.Vinh.