N.Vietnam, Cao Bang Prov., Trung Khanh Distr., Ngoc Khe Municipality, Pac Nga village, around point 22º54'59''N, 106º31'44''E, at elevation 800-850 m a.s.l. Remnants of primary evergreen broad-leaved forest along tops of rocky ridges and mesae composed with light gray solid marble-like highly eroded crystalline limestone. Terrestrial and lithophytic creeping herb on rocky mossy slope. Leaves deep brown-violet with central white stripe. Rare.
Record creation: 2020-07-30, Аверьянов Леонид ВладимировичCitation: Specimen LE 01087277 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01087277