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. Prostrate herb. Very common. Commonest weed all over the area.
VH 5467 20.04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)