FLORA OF VIETNAM. Elatostema ficoides Wedd. N. Vietnam, Prov. Cao Bang, distr. Tra Linh, municipalite Quoc Toan,. vicinity of Thang Heng and Lung Tao villages near Thang Heng lake. Remnant closed evergreen primary broadleaved forest in alluvial valley. bottom between limestone ridges and mesas near karst lake at 500 m alt. Terrestrial and epilitic herb up to 0.6 m hg on shadow wet steep rocky. slopes near lake side. Flowers white. Common. No VH 4850  25-27.05.1997. International Botanical Expedition of the U.S.A. National Geographic. Society (grant No 5803-96) . Collectors: L. Averyanov, N.T. Hiep