Houphan Prov., Hem Distr., Khon Ngua village, around point 19°55′53.2′'N 103°16′24.2′'E. Secondary broad-leaved evergreen open dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 700-950 m a.s.l. Terrestroal herb in shady mountain slopes. Flowers white, sometime with light violet tint. Leaves with many yellowish transversely elliptic spots. Common. LA-VN 1467 15 April 2015 photos Coll.: N.T.Hiep, L.Averyanov, N.S.Khang, N.Q.Hieu, T.Maisak, Pheng Phengsintham, Somchanh Bounphanmy.
Coordinates (geographic position):19° 55′ 53.2″ N, 103° 16′ 24.2″ E ±1000 mRecord creation: 2021-12-02, Tatiana Maisak, PhotoScan D2Citation: Specimen LE 01077631 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01077631