FLORA OF LAOS Urticaceae Pilea sp.nov.? “scolopendria major” Vientiane Prov., Vang Vieng Distr., Na Po village, about 12 km to the W of Vang Vieng town, Pa Nang Oua Mt., around point 18°55’36.4”N 102°20’44.6”E. Dry broadleaved secondary evergreen forest on very steep rocky slopes and on vertical cliffs of remnant highly eroded rocky limestone mountains composed by solid crystalline limestone at elevation 350-450 m. Lithophytic clustering herb on shady mossy cliff. Locally very common. LA-VN 506 17 March 2013 Coll.: N.T.lliep, L.Averyanov, K.Chantthavongsa, N.S.Khang, P.V.The, S.Lorphengsy