Syst. Nat. 2: 853 (1791) APNI
Threat status:Victoria: vulnerable (v); listed in Flora and Fauna Guarantee Act 1988
Stems 3–10 mm diam., covered in mucilage. Leaves elliptic, 2.5–9 cm long, 1.5–6 cm wide; petioles to 30 cm long or more (bringing leaf to water surface); young leaves inrolled longitudinally. Flowers long-pedicellate (bringing flower to water surface); perianth segments 9–18 mm long, dark reddish-black or purplish; stamens 12–37, filaments reaching 1 cm long (extending after pollination of stigma); carpels 6–16, ovules usually 2 per carpel. Fruit beaked. Flowers Oct.–Feb.
NIS, VRiv. Also Qld (?now extinct), NSW. Tropical parts of Africa, Asia and America. Known in recent times only from shallow lagoons of the Goulburn River and tributaries near Nagambie, but there locally common. Early records from the lower Ovens and Mitta Mitta Rivers suggest a former wider range.
Plants need to remain submerged (except for floating leaves and flowers) in freshwater year-round. The flowers rise twice to the surface, firstly to be pollinated, then a day later to release pollen.
|Bioregion||Occurrence status||Establishment means|
|Northern Inland Slopes||present||native|
|New South Wales|