Posted: 10/01/2018 at 16:17
Looks to me like Lesser celandine (Ficaria verna) its sunny flowers are one of the first signs of spring
It can be quite invasive, but the leaves die down by midsummer and that's the last you see of them until they appear again about now. They are very difficult to get rid of as the roots have little ;'nodules' which get left behind, when you try to dig them up, and every nodule grows into a new plant. If they're in grass it's often thought better to leave them to do their thing and just mow after flowering to keep them under control.
I'm afraid I love their sunny smiling faces on the banks in spring ... I grow the less invasive form 'Brazen Hussy' http://www.gardenersworld.com/plants/plant-finder/ficaria-verna-brazen-hussy/
Last edited: 10 January 2018 16:19:41