T.E.R:R.A.I.N - Taranaki Educational Resource: Research, Analysis and Information Network

Ranunculus muricatus (Rough-fruited buttercup)

Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Order: Ranunculales
Family: Ranunculaceae
Genus: Ranunculus
Species: R. muricatus
Binomial name: Ranunculus muricatus
Common names: Rough-fruited buttercup, Spinyfruit buttercup, Burr buttercup, Prickle fruited buttercup, Prickle-fruit buttercup, Rough-seed buttercup, Sharp buttercup, Sharp-fruited buttercup,

Ranunculus muricatus is an annual or perennial species of buttercup native to Europe, but it can be found in many other places in the world, including New Zealand where it is an introduced species and agricultural and roadside weed. It grows in wet habitats, such as irrigation ditches, wetlands, swamps, winter-wet depressions. It produces a mostly hairless stem up to half a meter long which may grow erect or decumbent along the ground. The leaves have blades a few centimetres in length which are deeply divided into three lobes or split into three leaflets. They are hairless to hairy in texture and are borne at the tips of long petioles. The flower has five shiny yellow petals under 1 centimetre long around a lobed central receptacle studded with many stamens and pistils. The fruit is a spiny achene borne in a spherical cluster of 10 to 20.
Contact with this plant can cause minor dermatitis in some individuals.



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