N. Vietnam, prov. Cao Bang, distr. Bao Lac, municipality Yen Lac, vicinities of Yen Lac village (N 22°44′ E 105°50′). Secondary wet short tall grasslands on alluvial shale valley between limestone remnant karst ridges at 1000-1050 m elev. Herb up to 0.5 m hg in open wet place. Flowers white. Common. CBL 1334 14 April 1999 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6300-98) Collectors: P.K.Loc, P.H.Hoang, Averyanov L.
Coordinates (geographic position):22° 44′ N, 105° 50′ E ±1000 mRecord creation: 2021-12-02, Tatiana Maisak, PhotoScan D2Citation: Specimen LE 01077722 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01077722