Ranunculus amplus N.G.Walsh & B.G.Briggs

Lacey River Buttercup

Muelleria 17: 15 (2003) APNI

Taxonomic status:Accepted

Occurrence status:Endemic

Establishment means:Native

Threat status:Victoria: rare (r)

Stoloniferous, aquatic or semi-aquatic perennial, to c. 50 cm high. Leaves both tufted at base and cauline; petioles to 45 cm long, glabrous; lamina palmatisect, c. orbicular in outline, 5–13 cm diam., with ultimate segments narrow-linear, 0.5-2 mm wide, glabrous. Flowering stems erect, exceeding leaves, usually 1–3-flowered; sepals 5, spreading, ovate to obovate, 3–6.5 mm long, glabrous or shortly ciliate near basal margin; petals 8–16, narrowly obovate to obovate, 5–13 mm long, 3–6 mm wide, yellow; nectary lobe free in upper quarter, obtuse to truncate, c. 1 mm long; stamens 20–45. Achenes 25–45, ± lenticular, 2–4 mm long, the sides smooth or somewhat warty, sometimes distinctly rippled; beak 0.5–1.3 mm long, straight or reflexed; receptacle shortly hirsute in the staminal zone, with scattered hairs between achenes.      Flowers Oct.–Nov.

DunT, EGL, GipP, Glep, GGr, HSF, VVP, WaP, Wim. Scattered throughout southern Victoria, but most common in south-west. Grows in stream verges and swamps. Plants are usually partially submerged, with emergent leaves and flowering stems.

Ranunculus amplus closely resembles R. inundatus, differing in being considerably larger in most respects. Typically, R. inundatus has leaves to 5 cm diam., up to 7 petals that are up to 7 mm long and achenes to 1.5 mm long.

Created by: Andre Messina, 2015-02-10
Updated by: Val Stajsic, 2018-12-03
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 amplus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Ranunculus amplus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Glenelg Plain present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Warrnambool Plain present native
Greater Grampians present native
Dundas Tablelands present native
East Gippsland Lowlands present native
Highlands-Southern Fall present native

State distribution

Distribution map
South Australia
New South Wales