There are no significant taxonomic issues associated with this name. A. nodiflorum has been shown to hybridise with A. inundatum (A. ×moorei (Syme) Druce) but the hybrid is very infrequent, it is unlikely to affect the survival of the species or this assessment.

European regional assessment: Least Concern (LC)
EU 27 regional assessment: Least Concern (LC)
 
This species is classed as Least Concern as it is widespread with stable populations and does not face any major threats.

A. nodiflorum occurs from the Azores and Canary Islands to North Africa, east to Turkey and north to Estonia. It is naturalised in North America (California). It is widespread in central and western Europe, becoming less common in the east and south.

A. nodiflorum is widespread and abundant throughout much of its range and the populations are stable in most parts apart from western Central Europe where they suffer from eutrophication and are declining.

A. nodiflorum occurs in a wide variety of wetland habitats usually on nutrient-rich, neutral soils, such as the margins of rivers, streams, lakes, ponds, canals and ditches as well as in marshy grassland and anthropogenic habitats such as gravel pits.

At the Central European margins of its distribution, eutrophication has been noticed as threat factor. But in most parts of its range there are no known past, ongoing or future threats to this species.

A. nodiflorum is classed as Critically Endangered in Switzerland, and as Vulnerable in Germany. Conservation measures on a local to national scale seem appropriate there and elsewhere in Central Europe. In Bulgaria, it is protected by the national Biodiversity Act.