This yellow rose (which I think is Rosa xanthina 'Canary Bird') is always the first to flower in my garden and this year began to bloom in late April - amazingly early.
A few years ago I grew one plant of greater celandine from seed - and let it go to seed. Now it appears all over the garden. The common name is misleading - it's not related to the lesser celandine (which is in the buttercup family) - it's a member of the poppy family.
Like opium poppy it exudes latex when the stem is cut, but in the case of greater celandine the latex is bright orange.