I have the a nice ground cover plant that's been in my garden since we bought the house last summer. Even in the drought that we had last summet this little plant stayed very green with no watering at all. At one point it had little white flowers. In the fall it died back and dropped the little seeds that you see in the the second photo. For the life of me, I can't seem to find an identifiaction for this plant. Does anyone here have any idea what this plant is?

Thanks,

David