Callitriche muelleri Sond.

Round Water-starwort

Linnaea 28: 229 (1856-57) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Terrestrial or amphibious. Leaves c. rhombic, 2.5–7.5 mm long, 1.5–5 mm wide, often apiculate, sometimes with a single tooth on each side, 3–5-veined, petiolate; upper leaves not rosetted. Flowers usually paired, a male and female together in 1 axil; bracteoles absent; stamen 0.25–0.3 mm long, not elongating as fruit ripens, much shorter than ripe fruit; styles erect, c. 0.05 mm long, lengthening in young fruit, soon falling. Fruit obcordate, 1.1–1.2 mm long, 1.2–1.4 mm wide, subsessile; wing c. one-third the width of the mericarp, membranous, crisped, pale.

EGL, EGU, GipP, Glep, HFE, HSF, OtP, OtR, Strz, VVP, WaP, WPro. Also ?NT, Qld, NSW. Widespread across higher-rainfall parts of Victoria where occurring mostly on damp soil or logs in places subject to inundation. Flowers Oct.-Feb. Fruits Oct.-May.

Source: Jeanes, J.A. (1999). Callitrichaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Lamiales
genus Callitriche
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Callitriche muelleri in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Callitriche muelleri in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Glenelg Plain present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Wilsons Promontory present native
Highlands-Southern Fall present native
Otway Ranges present native
Strzelecki Ranges present native
Highlands-Far East present native

State distribution

Distribution map
New South Wales