Euphorbia prostrata, commonly known as prostrate spurge or prostrate sandmat, is an annual herb originally native to tropical and subtropical regions of the Americas, including the Caribbean and parts of South America. It is adapted to a variety of habitats, including open areas, disturbed sites, and roadsides. Typically, it has slender, prostrate stems that can grow up to 8 inches long, with oval-shaped leaves that have finely toothed edges. The plant produces small, inconspicuous white cyathium flowers throughout the growing season. While not particularly showy, the flowers are characteristic of the Euphorbiaceae family.

Prostrate spurge is known for its rapid growth and ability to cover ground quickly, making it useful as a temporary ground cover in warm climates. However, it is also considered a weed in many regions due to its invasive nature. It thrives in full sun to partial shade and prefers well-drained soils but can tolerate a range of soil types and conditions. In cultivation, it requires minimal care and is drought-tolerant once established. Gardeners should be cautious, as the plant can become invasive outside its native range, and its milky sap may cause skin irritation or allergic reactions.CC BY-SA 4.0