FLORA OF LAOS Hin Nam No Nature Protected Area Convallariaceae Peliosanthes cryptogamica sp. nov. ? (P. inaperta Aver. & N. Tanaka aff.) Laos, Khammoune prov., Boualapha distr., Nong Seng village, Vang Phae Lay mountain, around point 17°31'02.7"N, 105°47'17.2"E. Primary dry evergreen and semideciduous broad-leaved forest on very steep rocky slope near karstic hill top composed with solid, marble-like highly eroded limestone at 300-530 m a.s.l. Terrestrial and lithophytic herb on steep shady rocky slope. Very common to abundant. Usual co-dominant of forest herbaceous stratum. Flowers dark green, cleistogamous (?). 11 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 909.