Thanks, Alisdair,
I can take no credit for it - it came from a friend who was a great collector of bulbs and alpines and I especially treasure it as a memory of her.
This yellow Oxalis meisneri also came from her, but under the name O.kaajvoensis (perhaps it should have been Oxalis kaajagdensis?).
Oxalis palmifrons is usually grown for it's wonderful foliage but it does also flower for us before the leaves emerge,
cheers
fermi