LOL! Sidare is an I. nil cultivar. Not a species MG!
Ronnie is correct that is a photo of just one cultivar of Sidare. Seems the Japanese has created Sidare in all different types of blooms. I posted a link (on another thread) to an old thread from last year showing the one I grew. I'm growing it again this year and hope to get lots of seeds for more sharing. I shared almost all that I had last year with everyone that wanted them. Just planted the last of those seeds this past weekend in a bowl planter that the vine can drape down from. It bloomed a lot for me last year and I got a lot of seeds. Now I need to work on crossing it with other colors to get some diversity in blooms! :-)