Cardionema ramosissimum is a perennial plant in the family Caryophyllaceae, commonly known as sandcarpet, sandmat or tread lightly. It is a small, clumping, mat-forming plant found in a number of diverse habitats throughout its range, from sandy beaches and dunes to the high elevations of the Andes mountains. Cardionema ramosissimum has a disjunct distribution throughout the Americas, and is found on the Pacific coast of North America from Puget Sound to Baja California, in central Mexico, and widely across South America, from the Andes in Colombia to most of Argentina.

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