Mazus arenarius is a ground-covering perennial with creeping stems that root at the nodes. It sports small, lobed leaves which hug the ground closely. During its blooming season, it boasts delicate, tubular flowers often tinged in pale purple or blue, with spotted throats, reflecting an adaptation to attract specific pollinators. Thriving in sandy soils, mazus arenarius is well-adapted to poor, dry environments, its dense mat-forming habit protects the soil from erosion.