It spreads by rhizomes, tubers, seed, tubers and entire plants which can detach and float downstream.
Widespread from northern Victoria to South-East Queensland.

Photo: Robert Whyte
Foliage and Flowers
The Auckland Regional Council (2002) reports, “S. platyphylla has fleshy rhizomes that are usually submerged below the water surface, while leaves are held above the surface by rigid stems. There are two kinds of leaves: emergent leaves that are linear to ovate, tapering abruptly to a point with stems that are triangular in cross-section and winged towards the base; and submerged leaves that are strap-shaped. The white or sometimes pink flowers are found in clusters of three-flowered whorls at the end of the flower stem.”

Photo: Robert Whyte
Flowers (male – yellow anthers)
Fruit a cluster to 15 mm across, consisting of flattened, winged 1-seeded segments.
EFloras.org (UNDATED) reports that, “The inflorescences are racemes of 3-9 whorls. Flowers can be 1.8 cm in diameter and the sepals can be spreading to recurved. Fruiting heads are 0.7-1.2 cm in diameter”.

Photo: Sheldon Navie
Flowers (female – green ovaries)
Synonyms: Sagittaria graminea var. platyphylla Engelm, Sagittaria mohrii J.G. Sm.
