N. Vietnam, prov. Cao Bang, distr. Thach An, about 25 km to SSE from. Cao Bang town (N 22°27' E 106°22). Primary evergreen closed. semideciduous forest on tops of remnant limestone ridge at 500 m alt. Epilite shrub with shoots up to 1.5 m lg. Very common on open rock. outcrops and cliffs at 300-500 m alt. No CBL 928 05 Dec. 1998. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 6300-98). Collectors: Averyanov L., N.Q.Binh, N.X.Tam.
Coordinates (geographic position):22° 27′ N, 106° 22′ E ±1000 mRecord creation: 2019-05-09, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01054480 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01054480