chelidonium majus.

There are three plants with yellow flowers called celandine in the British Isles: the Greater Celandine (Chelidonium majus), the Lesser Celandine (Ranunculus ficaria), and the Celandine Poppy (Stylophorum diphyllum). Over here on the other side of the pond, the lesser celandine is not nearly as common as other buttercups and isn't mentioned much in North [...]