FLORA OF LAOS Convallariaceae Polygonatum sp. 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 broad-leaved 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. Terrestrial herb in shady places. Locally common. LA-VN 502 17 March 2013 Coll.: N.T.Hiep, L.Averyanov, K.Chantthavongsa, N.S.Khang, P.V.The, S.Lorphengsy