White Flower Farm's catalog says this clematis was "formerly known as Blue Moon" and now is called 'Claire de Lune'.

Anyhow, I ordered 2 from bluestoneperennials.com, and this is my favorite clematis yet. The ruffled edges give it an elegant beauty beyond wht the picture can say. It has a green tint in the middle of the white which gives it even more intrique. What is best of all is that I got a couple of blooms already, and I planted them the 1st week of June, this year, and in almost deep shade. I highly recommend this one.