FLORA OF LAOS Urticaceae Pilea sp.nov.? “scolopendria major” Vientiane Prov., Kasi Distr., Thong Mout village, around point 19°26’51.5”N 102°07’45.8”E. Primary broad-leaved evergreen forest on very steep rocky slopes and on vertical cliffs of remnant highly eroded rocky limestone mountains composed by solid crystalline stratified limestone at elevation 1550-1650 m. Clustering pendent lithophyte on vertical shady cliffs. Flowers greenish. Very common. LA-VN 589 20 March 2013 Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, P.V.The, S.Lorphengsy