Oxalis purple clover. Part-shade. Perennial? Gorgeous foliage and cute white flowers that bloom spring through early summer. If this is anything like my wood sorrel, it spreads readily, is somewhat drought tolerant, and just an easy-going, shade-loving wonder plant. (2013)
Scarlet Flame Carpet Phlox. Grows anywhere! No other plant spreads so lavishly, needs so little attention and flowers so profusely with so little care. Needlelike, semi-evergreen leaves form a dense ground cover smothered with blossoms in early to mid spring. Grows only 2-6" tall and has a neat creeping habit. Thrives anywhere, even in poor, dry, sandy soil where other ground covers fail.