swamp-lily
Ottelia ovalifolia (R.Br.) Rich.

Ottelia ovalifolia, known as swamp-lily, is an aquatic plant in the Hydrocharitaceae family. It is native to the Australian mainland and has been introduced to New Zealand, Vanuatu, and the Solomon Islands.
Description
Ottelia ovalifolia (R.Br.) Rich. is an aquatic species in the Hydrocharitaceae family, commonly called swamp-lily. It is native to the Australian mainland and has spread to New Zealand, Vanuatu, and the Solomon Islands. Its distribution includes regions such as New South Wales, Queensland, and other parts of Australia. The species was first described in 1814.
Other common names
swamp-lily
Distribution
Australasian · SB · MG · NZ · New Caledonia · New South Wales · New Zealand North · New Zealand South · Northern Territory · Queensland · South Australia · Victoria · Western Australia
Synonyms
Damasonium ovalifolium