Checker mallow

Family: Malvaceae mallows, mauves
Genus: Sidalcea checkermallow, checkerbloom

There are many species of Malvaceae Sidalceae (checker-mallow)

This is probably either:
1) Sidalcea virgata Howell virgate checkerbloom
2) Sidalcea hendersonii

Paul Slichter's web site indicates that "To determine the varieties of Oregon checker-mallow, you will need to use a good hand lens and look at the type of hairs found on the stem, leaves and calyx."