Vientiane prov., Kasi distr., between San and Tham Tai villages, around point 19°17′47.9′'N 102°08′58.9′'E. Secondary broad-leaved evergreen dry forest on very steep rocky mountain slopes composed by solid marble like highly eroded limestone at elev. 900-1000 m a.s.l. Creeping lithophytic fern of shady humid mossy boulders. Not rare. LA-VN 1642 25 March 2017 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, C.Q.Ngan, T.Maisak, Khamla Inkhavilay, Hongthong Southyvohanh, Pinmany Sisavath, Chanthala Cheuaysamphanh.
Coordinates (geographic position):19° 17′ 47.9″ N, 102° 8′ 58.9″ E ±1000 mRecord creation: 2021-12-02, Tatiana Maisak, PhotoScan D2Citation: Specimen LE 01077706 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01077706