S. Vietnam, Kontum Prov., Kon Plong Distr., Hieu Municipality, Mang La forest enterprise (14°39′N, 108°25′E). Open secondary short tall grassland along river at elev. 1100 m. Sedge up to 0.6 m hg in open wet place. Very common. Commonest weed all over the area.
VH 5471 20.04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)