A fast-growing, fast-spreading weed of creeks and roadsides that colonises by means of wind-borne seeds.
Leaves compound with up to 3 narrowly ovate to elongated leaflets with pointed tips. Leaflet margins are serrated.
The flowers are yellow and tubular, with 5 rounded lobes and a ridged, somewhat hairy throat with reddish lines running lengthways.
Flowers in spring in spikes at the ends of branches.
Fruit are long flattened capsules with many seeds.
Photo: Matt Tomkins