N.Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe Municipality, Pac Nga village, around point 22°54'59"N, 106°31'44"E, at elevation 800-850 m a.s.l. Remnants of primary broad-leaved evergreen and coniferous forest along tops of rocky ridges and mesae composed with light gray solid marble-like highly eroded crystalline limestone. Lithophytic herb 0.5-0.7 m tall on very steep rocky shady slope. Not common. No HAL 5747 14 June 2004. Collectors: L.Averyanov, P.K.Loc, P.V.The, N.T.Vinh.
Coordinates (geographic position):22° 54′ 59″ N, 106° 31′ 44″ E ±1000 mRecord creation: 2019-03-16, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01048847 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01048847