Glaucium flavum is a plant species belonging to the family of Papaveraceae. It is commonly known as sea-poppy or yellow-horned poppy. The plant has various synonyms including Chelidonium luteum, Glaucium flavum subsp. aureum, Glaucium flavum subsp. luteum, and Glaucium luteum. The sea-poppy is native to the Mediterranean region, and it grows in saline habitats such as cliffs, sandy coasts, and salt marshes. Its stem contains a yellow latex with medicinal properties, while the flowers and the leaves have decorative features. The plant has been used for centuries in herbal medicine to treat various ailments, such as coughs, skin diseases, and pain.