Posted: 02/07/2014 at 20:47
Last one looks like Thalictrum delavayi, I think it has now been renamed Thalictrum dipterocarpum. It is easy from seed, Try chiltern seeds.
There is a double one called hewitts double, but you dont get the airy fairy look.
If you want a good patch. plant 10 or 12 in a block six inches apart. It will seed about after that.