FLORA OF LAOS Nakai-Nam Theun Protected Area Primulaceae Lysimachia trifida Aver., sp. nov. ? 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 rocky slope. Leaves dark velvety green. Not rare. 15 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, AL 1083.