Houphan Prov., Viengxay Distr., Vieng Xai village, around point 20°23'41.3''N 104°13'44.5''E. Primary and secondary broad-leaved evergreen dry forest on very steep rocky slopes of highly eroded mountains composed by solid marble-like limestone at elev. 800-950 m a.s.l. Terrestrial and lithophytic stemless herb in limestone pockets on shady rocks. Leaves to 1 m long and 4 cm wide. Not rare. LA-VN 1125 7 April 2015 Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, N.Q.Hieu, T.Maisak, Somneuk Bouthamounty. Flowered in cultivation in 4 May 2015 and 25 May 2018. Flowers white. Photos.
Coordinates (geographic position):20° 23′ 41.3″ N, 104° 13′ 44.5″ E ±1000 mRecord creation: 2019-05-03, Leonid Averyanov, PhotoScan D1Citation: Specimen LE 01049627 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01049627