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 in open place. Flowers yellow. Very common. Commonest weed all over the area.
VH 5469 20.04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)