FLORA OF VIETNAM. Fam. Convallariaceae. Ophiopogon sp. N. Vietnam, prov. Ha Giang, distr. Meo Vac, municipality Sung Chang,. vicinities of Lu Lu Phin village (N 23°11' E 105°18'). Secondary open. broadleaved forest on steep slopes and bluffs of karst remnant. limestone ridge at 1300-1350 m elev. Terrestrial herb in shady places. Flowers light violet. Not rare. No CBL 1819 29 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.