FLORA OF LAOS Arecaceae Trachycarpus ravenii Aver. et K.N.Sinh, sp.nov. Paratype Vientiane Prov., Kasi Distr., Thong Mout village, around point 19°25’00.9”N 102°08’38.0”E. Cliffy outcrops of rocky limestone on forestless mountain tops among secondary grasslands at elevation 1700 m. Palm to 6 m tall and 15 cm DBH. Leaves palmate, almost circular, 0.8-1 m in diam., petiole 0.4-0.6 cm long. Female specimen. Rare. LA-VN 726 22 March 2013 photos Coll.: L.Averyanov, N.S.Khang, S.Lorphengsy