moss pink
/ˈmɒs ˌpɪŋk/noun
1= moss campion. Now United States regional.
2A mat-forming phlox, Phlox subulata, of the central United States, with flowers typically pink or violet.
Origin
Mid 17th century; earliest use found in Thomas Johnson (d. 1644), apothecary and soldier. From moss + pink.