Ranunculus amphitrichus Colenso

Small River Buttercup

Trans, & Proc. New Zealand Inst. 17: 237 (1885) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Variable, partially or completely submerged stoloniferous perennial. Leaves usually arising singly at nodes; petioles 1–15 cm long; lamina c. circular in outline, 1–5 cm diam., glabrous, deeply 3–5-lobed with entire or notched, ovate to cuneate segments (emergent form) varying to palmatisect with linear segments 1–3 mm wide (submerged form). Flowering stems usually emergent usually 1–4-flowered; sepals 4 or 5, spreading, broadly ovate, 2–3 mm long, glabrous; petals 4–9, oblong to narrowly obovate, 3–5 mm long, 0.5–2 mm wide, pale yellow-green or yellow; nectary a crescentic swelling c. one-third from base of petal, lobe absent; stamens c. 10–18. Achenes usually 6–15, obliquely obovate, biconvex, 1.5–2 mm long (excluding beak), smooth or slightly wrinkled or warted on sides when mature; beak slender, straight or slightly curved, 1–1.5 mm long; receptacle pitted, glabrous or with few hairs in the staminal zone. Flowers Oct.–Dec.

Brid, CVU, DunT, EGL, EGU, GipP, Glep, GGr, HFE, HNF, HSF, MonT, MuF, NIS, OtP, SnM, Strz, VAlp, VRiv, VVP, WaP, WPro. Also WA, SA, NSW, ACT, Tas. New Zealand. Fairly widespread on and south of the Dividing Range, occurring in swamps, lakes and slow-flowing streams and rivers from near sea-level to the subalps.

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 amphitrichus in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Ranunculus amphitrichus in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Glenelg Plain present native
Bridgewater 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
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
Wilsons Promontory present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Strzelecki Ranges present native
Monaro Tablelands present native
Highlands-Far East present native
Victorian Alps present native
Snowy Mountains present native

State distribution

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