We weren't able to identify this plant in our garden for several years. Neither of us remember buying it, but we thought it may have been something we bought when we were collecting sedums. At any rate, it has done very well, and recently a friend recognized it as GRAY SANTOLINA. A welcome addition to our Rock Hill Garden with it's yellow button flowers and gray-green foliage. It thrives in the sunny backyard on a sloped hill.