Plant with yellow flowers growing on water's edge

Plant with yellow flowers growing on water's edge

Observation - Plant with yellow flowers growing on water's edge - Southern Africa. Description: Plant with yellow flowers, approx 1m high, growing on water's edge. Flowers approx. 2 to 3cm.

Plant with yellow flowers, approx 1m high, growing on water's edge. Flowers approx. 2 to 3cm.