Yes Leftwood, I WAS a member of ORGS for several years, but being over an hour north of Toronto and with the meetings on Sunday, I was not attending any meetings. I am a member of Nargs and enjoy the journal quite a lot! I also am a member of the Scottish Rock Garden Club, The Hardy Plant Society (UK), and the Hardy Geranium Group... More seeds available than I could ever sow anyway. :)
Yes that is a really 'old' name! I only know of one double erodium and that is Erodium x variabile 'Flore Pleno'. A photo of mine below. It is not hardy here.