FLORA OF LAOS Nakai-Nam Theun Protected Area Convallariaceae Peliosanthes cryptogamica sp. nov. ? (P. inaperta Aver. & N. Tanaka aff.) Laos, Khammoune prov., Boualapa distr., Langkhang village, steep southern slopes of sandstone ridge allied to the road from the north between points 17°34'02.2"N 105°42'42.6"E, 200 m and 17°34'51.1"N 105°43'01.2"E, 535 m a.s.l. Primary lowland semideciduous and evergreen dry forest on very steep rocky slopes. Terrestrial herb on shady rocky slope. Very common, co-dominant of herbaceous forest stratum. 15 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, AL 1076.