Vietnam, Quang Binh Prov., Bo Trach Distr., Tan Trach Municipality, about 1.5 km to SE of A Rem village (17º23'32''N, 106º12'46''E). Primary closed coniferous forest (with Calocedrus rupestris) on steep slopes and on tops of rocky ridge composed with solid marble-like highly eroded stratified crystalline limestone at elevation about 750-900 m a.s.l. Creeping lithophytic herb. Leaves very deep green to black with whitish median stripe. Common.
Record creation: 2020-07-30, Аверьянов Леонид ВладимировичCitation: Specimen LE 01087280 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01087280