Spergularia

Spergularia is a genus of flowering plants in the family Caryophyllaceae, commonly known as sand sparks or sea sparks. These plants are found in temperate regions worldwide, often in coastal areas, salt marshes, and sandy or gravelly habitats. They are typically small, herbaceous annuals or perennials with a sprawling or mat-forming growth habit.

The leaves of Spergularia species are usually linear or awl-shaped, often succulent, and arranged oppositely. They may be simple or slightly toothed. The flowers are small and inconspicuous, typically pink or white, with five petals that are often notched or absent. They usually have five sepals, and multiple stamens. Spergularia flowers are generally borne in terminal cymes or solitary.

The fruit is a capsule that dehisces to release numerous small seeds. Many species are adapted to saline or alkaline soils, which contributes to their distribution in coastal and arid environments. Spergularia species can be difficult to distinguish from one another, and many have a wide geographical distribution. Some species are considered weeds, particularly in disturbed habitats.