FLORA OF VIETNAM Pontederiaceae Monochoria ovata Kunth
Vietnam, Thua Thien – Hue Prov., A Luoi Distr., Hong Kim Municipality, Dut village, about 2 km to NE from point 16°17′54′'N, 107°12′41′'E near A Nor waterfall at elevation about 600 m a.s.l.
Open secondary shrubs and remnants of secondary broad-leaved forest on slopes of A Nor stream composed with shale and granite.
Sub-aquatic plant on wet open places along stream, sometimes in shallow water. Flowers blue. Very common.