Flower ID

Hi all, Any idea what this plant is?  I have several growing and they came in a 'bee and butterfly' mix I planted about 3 years ago.  To my surprise they come up again from the same rootstock rather than self-seeding.  The flowers look a little like mallow, but the leaves certainly don't!

Whole plant:

 Flower close-up:

Leaf close-up:

 Many thanks for any ideas!

Could it be Musk Mallow Bob? It is very pretty!

http://wildseed.co.uk/species/view/85

Pam x

Hi Pam, I think you have got it in one!

Many thanks!

I think it is Sidalcea, the prairie mallow.    I have a white one and a pink one in my garden.

I have both musk mallows and sidalcea, I think this one's a musk mallow. The flowers are similar, but the habit of sidalcea is more erect, less bushy, and the stems are more spire-like.