Astonia is a monotypic genus in the family Alismataceae containing the sole species Astonia australiensis found in Queensland, Australia. It is sometimes included in the genus Limnophyton. It was named in honour of Australian botanist Helen Aston.
- Jacobs, Surrey (1997). "Astonia (Alismataceae), a new genus for Australia". Telopea. 7 (2): 139–141. doi:10.7751/telopea19971004.