Violet Woodsorrel

pretty purple flowers in my backyard
they kind of resemble the violet I identified a few days ago. however these seem to grow along with a clover that is ALL over the yard. Definately specified as a pest/ weed.

I googled clover because the leaves of the plant are very similar to a clover. I figured out after awhile that it had some relation to the wood sorrel. Through a few minutes of browsing I finally settled on the violet woodsorrel. (Olaxis violacea)
http://en.wikipedia.org/wiki/Oxalis_violacea