Hey Georgia Pond:
I was thinking about plants for that site (I know you are into the grass) and just what popped into my mind were anything in the Sedum family, and Vinca Periwinkle. My mom lived in Florida for a while I recall thinking about the Vinca Periwinkle we plant here as an annual, it grew like a little bush down there. Those plants are drought tolerant, require little care, and hold in the soil to prevent erosion and take up nutrients. The adavantage to the native non-invasive plants to your area is that the root systems grow deep and hold the soil in place. It was nice to think about those flowers at my mom's, she died in 1999.
