Ranunculus ficaria — Ficaire, Speenkruid, Celandine

Ben Zonneveld:. The double form does not make bulbils and the
same is true for most cultivars and these are easier to remove.
J.J Flintoff: Your large -flowered robust lesser celandine is Ranunculus ficaria ssp
ficariiformis. It is sometimes called R f ' Major ' in older horticultural
literature. The smaller weedy one is R f ssp bulbifer which has bulbils in the leaf
axils allowing it to spread in an alarming way. It is this form which gives the
species a bad name.
Many of the choicer cultivars are derived from R ficaria ssp ficaria
which doesnt have the above-ground bulbils. They however must be dead-headed to
prevent spreading by seeds. Many are worth the effort.