N. Vietnam, Thai Nguyen prov., Vo Nhai distr., Than Sa municipality, vicinities of Kim Son village (N 21º48' E 105º54'), 23.3 km to 18º of Thai Nguyen city. Primary dry broadleaved evergreen forest on very steep rocky slopes of remnant karst limestone ridge at elev. about 300 m a.s.l. Lithophytic forb on shady rocks. Common. No NTH 3831 24 Oct. 1999 N.T. Hiep, P.K. Loc, L. Averyanov.
Coordinates (geographic position):21° 48′ N, 105° 54′ E ±1000 mRecord creation: 2019-02-22, Leonid Averyanov, PhotoScan D1Citation: Specimen LE 01049252 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01049252