FLORA OF LAOS Convallariaceae Polygonatum kingianum Collett & Hemsl. 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. Erect or scandent herb with stem to 1.5 m long in open slope among secondary scrub and on secondary grasslands. Flowers brightly red. Occasional. LA-VN 618 20 March 2013 Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, P.V.The, S.Lorphengsy