Sesuvium maritimum is an annual herbaceous plant native to southeastern North America in the family Aizoaceae.

[4][5] Sesuvium maritimum is a succulent herb that can grow up to 30 cm tall, with smooth, glabrous leaves and white or pink inflorescences.

[3][5] It has an opposite or sub-opposite leaf arrangement composed of simple, oblanceolate or linear fleshy leaves that are about 1-2.5 cm long and 1–5 mm wide.

[9] The Sesuvium genus was named after the Gallic tribe Sesuvii, who resided in the Atlantic maritime region of France from around 58–50 BC.

[10] The slender sea purslane is currently endangered in New York state, Maryland, North Carolina, Kansas, and Southern Florida.