Malva is, I’m pretty certain, closely related to hollyhock. It is supposed to be a host plant for the Painted Lady butterfly, although I have not seen any on it yet. This is a variety which I had bought the seeds for quite a while back but never any luck with them before, but this year one of my plants is blooming very nicely!
Here is a close up of the flowers:
Here is the plant from a little distance: