Ranunculus L. >

Petals yellow. Leaves sometimes divided into linear segments but then 1 mm wide or more and arranged in one plane only Ranunculus
consider the other alternative
Leaves entire or toothed but not lobed or dissected, linear to lanceolate, c. 4–6 cm long. Flowers up to 20 mm diam. Petals obovate. Achenes pitted. Wingecarribee Swamp. Damp places. Introd from Europe. Lesser Spearwort Ranunculus flammula