Richard, L.C.M. in Gray, A. (1848), A Manual of the Botany of the Northern United States Edn. 1: 460 [tax. nov.]

• Type: (not designated).

Mueller, F.J.H. von (1882), Systematic Census of Australian Plants: 121 [pro parte taxonomic synonym]

pro parte taxonomic synonym of: Alisma L. legitimate

Mueller, F.J.H. von (December 1889), Second Systematic Census of Australian Plants: 205 [secondary reference]

Small, J.K. (30 June 1909), Alismaceae. North American Flora 17: 45-46 [secondary reference]

• Type: Echinodorus rostratus (Nuttall) Engelm.

Cronquist, A.J. (1981), An Integrated System of Classification of Flowering Plants: 1051 [secondary reference]

Haynes, R.R., Les, D.H. & Holm-Nielsen, L.B. in Kubitzki, K. (ed.) (1998), Alismataceae. The Families and Genera of Vascular Plants 4: 16-17 [secondary reference]

Mabberley, D.J. (1 May 2008), Mabberley's Plant-Book Edn. 3: 296 [secondary reference]

Council of Heads of Australasian Herbaria (7 July 2021), Australian Plant Census: - APC [secondary reference]

taxonomic synonym: Aquarius Christenh. & Byng legitimate

• APC Dist.: Qld (naturalised)

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