Euphorbia polychroma: An undemanding perennial, Euphorbia polychroma offers a pleasing contrast of colors on a neat, almost architectural form. It grows to about 15in and produces a splendid show in May from bright yellow bracts. Their color is long lasting, but changes to rose-bronze as they age above the green foliage. A sensational ground cover plant or accent in a sunny garden. Quite tolerant of hot, dry conditions (but not the heat and humidity of the South).
Dierama pulcherrimum, Blackbird. Full sun and in a warm, sheltered spot. Flowers June to August. Angel's fishing rod is perfect for introducing movement to a well-drained border in a sunny, sheltered site, or for overhanging water. Initially slow to establish, it looks particularly good with early autumn-flowering ornamental grasses. More: http://www.crocus.co.uk/plants/_/dierama-pulcherrimum/classid.2694/
Lampranthus spectabilis--Trailing Ice Plant. Extremely drought tolerant. Great sunny groundcover. Great in sunny windowboxes. Blooms all summer. Will tolerate winter temps down to about 20F. Good in ATL winters.