Cao Bang Prov., Nguyen Binh Distr., Yen Lac Municipality, Chi Doi village, around point 22°45'34"N, 105°51'48.7"E. Primary fractionally logged coniferous forest with Pseudotsuga sinensis along highly eroded rocky limestone ridge at elevation about 1400 m a.s.l. Ascending terrestrial and lithophytic herb with leaves to 1 m (and more) long on rocky mountain slope. Not common.
Record creation: 2021-11-11, Leonid Averyanov, PhotoScan D2Citation: Specimen LE 01122505 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01122505