It's a low-growing, hairless perennial plant, with fleshy dark green, heart-shaped leaves and a yellow bloom.. The flower was about 20 cm in hight and the bloom had about 2-3 cm.
The plant is found throughout Europe and west Asia and is now introduced in North America. It prefers bare, damp ground and in the UK it is often a persistent garden weed. (Wikipedia)
Ranunculus ficaria exists in both diploid (2n=16) and tetraploid (2n=32) forms which are very similar in appearance. However, the tetraploid type prefer more shady locations and frequently develops bulbils at the base of the stalk. These two variants are sometimes referred to as distinct sub-species, R. ficaria ficaria and R. ficaria bulbifer respectively. (Wikipedia)