N. Vietnam, prov. Cao Bang, distr. Nguyen Binh, municipality Ca Thanh, vicinities Ca Lu village, about 7-8 km to SE from Yen Lac village (N 22°44′ E 105°50′), about 38 km to NWW from Cao Bang town. Old wet broadleaved semideciduous primary forest on steep slopes of remnant limestone ridge at 1350 m alt. Terrestrial herb in shadow karst canyons. Not rare. CBL 564 21 Nov. 1998 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: Averyanov L., P.K.Loc, N.X.Tam.
Coordinates (geographic position):22° 44′ N, 105° 50′ E ±1000 mRecord creation: 2019-08-29, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01058449 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01058449