Seashore mallow (Kosteletzkya virginica), also known as sweat weed, Virginia saltmarsh mallow, and salt marsh mallow, is an herb found in marshes along the eastern seashore of the United States. This flowering plant is in family Malvaceae of the order Malvales. Researcher John Gallagher describes the pink-flowered seashore mallow as both a perennial and a halophyte, or salt-tolerant plant, that grows in areas where other crops can't. The plant can grow to above 1 metre in height, the leaves are 6–14 cm long, cordate to lanceolate with toothed margins. The stems and leaves are hairy. Flowers are 5–8 cm across, with 5 petals surrounding a tube consisting of the fused stamens and style. It blooms from July to October with pale to deep pink flowers.