Bulbous Buttercup (Ranunculus bulbosus) is a member of the buttercup family (Ranunculaceae), and is a perennial plant with an attractive glossy yellow flower at the end of a 20 – 50cm stem. It forms a bulb like swelling at the base of the stem just underneath the soil surface. The leaves are three lobed petiolated basal leaves.
This plant is often confused with the meadow buttercup but can be differentiated by the swollen basal part of the stem. Bulbous Buttercup does not have a blub, instead it has a basal tuber. This basal tuber regenerates by develiping a new stem from the bulbil every summer. When the bright yellow flower is completely open, the sepals turn downwards, the lower leaves are then divided into thee leaflets, the stem itself is hairy.