S. Vietnam, Kontum Prov., Kon Plong Distr., Hieu Municipality, Mang La forest enterprise (14°39′N, 108°25′E). Open grassy swamp along forest river at elev. 1100 m. Sometimes in water. Flowers yellow. Locally common.
VH 5460 20.04.2000
International Botanical Expedition of the U.S.A. National Geographic Society (grant No 6383-98)