Phlox subulata, often called Moss Pink even though it comes in as many colors as the other groundcover Phloxes, is a mat-forming, sun-loving, semi-evergreen herbaceous perennial found in rocky and sandy barrens from New York to Michigan and south to Georgia and Louisiana. Leaves are needle-like or linear, and the vegetative mat is only about 6 inches tall. The flowers are five-lobed as is typical of Phloxes, with notched outer margins and fused at the base into a narrow tube containing the floral parts, including the golden yellow exserted stamens. It withstands hot, dry locations better than some of the other Phloxes, and contributes hugely to the landscape with a sweep of fabulous color (your choice!) for 3-4 weeks in spring and vigorous ground-covering thereafter. Phlox subulata tolerates thin, poor soils, and is even recommended for remediation of difficult, disturbed sites.