Powered by the Centre for Invasive Species Solutions
Plant Form: Floating or spreading herb.
Size: Thickets up to 3 m high.
Stem: Hairless, reddish on land, inflated with spongy white material when submerged, often rooting at leaf nodes.
Leaves: Twice divided, 12-25 leaflets in groups of 2-4 per leaf, leaflets in opposite pairs but arranged alternately on stem. Close when touched.
Flowers: In ball shaped clusters of 30-50 with prominent, gland tipped yellow stamens, smaller when plant is on land.
Fruit and Seeds: Oval shaped and brown seeds up to 5 mm long.
Habitat: Freshwater swamps, ponds, drainage channels.
Distinguishing Features: Glandular stamens distinguish from another Water mimosa species (Neptunia oleracea), but otherwise very similar.