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 herb in crevices of open rocks near mountain top. Leaves velvety green with median white stripe. Not common. 11 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 910a.
Coordinates (geographic position):17° 31′ 2.7″ N, 105° 47′ 17.2″ E ±1000 mRecord creation: 2019-04-20, Аверьянов Леонид Владимирович. Processing status: work_status_1Citation: Specimen LE 01049709 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01049709