Good point Poddington - winter colour is so often neglected. Winter jasmine has bright yellow flowers on bare stems and looks lovely.
Keyser - that's wonderful! Didn't know that one. Sadly my garden is too packed with plants and too tiny for a cotinus - but one day.....
Lizness - brilliant list!
havadayoff - i have a wee yellow potentilla and it reminds me of yellow buttercups - so pretty.