Plants of South Eastern New South Wales

Ranunculus amphitrichus

Flowering plant. Photographer Don Wood, Corin Road, ACT

Flowering plant. Photographer Richard Hartland, Wonnangatta, Vic

Line drawings. d. flowering plant; leaves, emergent (left) and submergent (right) leaves shown; petal; petal base and nectary; seed. EM Mayfield, National Herbarium of Victoria, © 2021 Royal Botanic Gardens Board

Common name

Small river buttercup

Family

Ranunculaceae

Where found

In mud, and in still and flowing water up to 8 m deep. Usually partially or entirely submerged. Kosciuszko National Park, the mountains to the north, ACT, tablelands, and ranges. Coastal south from Nowra. Rarely on the Western Slopes.

Notes

Variable, partially or completely submerged perennial herb to 0.35 m high, often with floating leaves and emergent flowers, stoloniferous. Hairless or very slightly hairy. Leaves usually single arising from the nodes, 1–7 cm diameter, thin-textured, more or less circular in outline, deeply divided into few or numerous segments, the segments narrow when deeply submerged, broader when aerial, margins 3-toothed or 3-many-lobed. Flowers yellow to pale yellow-green, with 4–9 petals each 2-5 mm long, in clusters usually of 1–4 flowers. Sepals spreading. Flowering: spring to autumn. Seeds 6–25, 1.5-2.2 mm long excluding the beak, oval to almost lens-shaped, the sides smooth or slightly wrinkled or warty, with a small slender straight or curved beak.

All native plants on unleased land in the ACT are protected.

PlantNET description:  http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Ranunculus~amphitrichus (accessed 4 February, 2021)