Veronica Repens has shiny, green, 1/2 inch long leaves that clothe prostrate stems, which gives moss-like effect. It has flowers that are 1/4 inch wide. The flowers are lavender to white and they grow in few-flowered clusters in spring.
Potentilla has dainty bright green foliage. It is a creeper that grows 2-6 inches high with small yellow flowers. It blooms in spring to late fall.