Regional Species Conservation Assessments per IBRA subregion.

Least concern

Near threatened

Rare

Vulnerable

Endangered

Critically endangered

Extinct

Data deficient

Adelaide

Arkaroola

Ceduna

Coober Pedy

Hawker

Innamincka

Marla

Marree

Mount Gambier

Oodnadatta

Renmark

Wudinna

Keith

Yunta

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IBRA regions

LEGEND

Murray Mallee (MDD02)	Murray Darling Depression	Rare   (IUCN: RA d(i,ii))   [likes clear standing water]
Murray Scroll Belt (RIV06)	Riverina	Rare   (IUCN: RA d(i,ii))   [no records; not common; confused with weed Elodea canadensis]

Botanical art

Kath Alcock painting: 1

Prior names

Serpicula verticillata

Common names

Hydrilla

Waterthyme

Distribution and status

Herbarium region: Murray
NRM region: South Australian Murray-Darling Basin
AVH map: SA distribution map (external link)