Ranunculus inundatus R.Br. ex DC.

River Buttercup

Syst. Nat. 1: 269 (1817) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Stoloniferous, aquatic or semi-aquatic perennial, to c. 30 cm high. Leaves both tufted at base and cauline; petioles to 15 cm long (rarely more in submerged plants); lamina finely palmatisect, c. orbicular in outline, 1–5 cm diam., with ultimate segments narrow-linear, 0.5–2 mm wide, glabrous or with very few scattered hairs beneath. Flowering stems erect, exceeding leaves, usually 1–3-flowered; sepals 5, spreading, broadly ovate to obovate, 2–3.5 mm long, glabrous; petals 5–7, narrowly obovate, 4–7 mm long, 2–4 mm wide, yellow, glossy; nectary lobe free in the upper half, obtuse, often oblique, 0.5–1 mm long overall; stamens c. 20–30. Achenes usually 20–45, obovate, c. 1.5 mm long, the sides almost smooth or with obscure low tuberculate ridges; beak slender, c. 1 mm long, reflexed; receptacle densely hispid in the staminal zone, subglabrous between the achenes. Flowers Sep.–Feb.

CVU, DunT, EGL, EGU, GipP, Glep, Gold, GGr, HNF, HSF, LoM, MonT, MuF, MuM, NIS, OtP, SnM, VRiv, VVP, WaP, Wim. Also WA, SA, Qld, NSW, ACT. Excepting the north-west, scattered, but locally rather common in permanent swamps, dams and backwaters of rivers throughout the State, often occurring near other aquatic or semi-aquatic Ranunculus species.

See note under R. amplus.

Source: Walsh, N.G. (1996). Ranunculaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2018-12-03
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Ranunculanae
order Ranunculales
family Ranunculaceae
genus Ranunculus
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Ranunculus inundatus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Ranunculus inundatus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Victorian Riverina present native
Murray Fans present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Monaro Tablelands present native
Snowy Mountains present native

State distribution

Distribution map
Western Australia
South Australia
New South Wales
Australian Capital Territory