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. Lithophytic clustering herb on open rocks near mountain top. Leaves dark glossy green. Not common.
11 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 945.
Coordinates (geographic position):17° 31′ 2.7″ N, 105° 47′ 17.2″ E ±1000 mRecord creation: 2019-01-13, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01048694 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01048694