Glaucium (Horned Poppy) is a genus of about 25 species of annual, biennial or perennial herbaceous flowering plants in the family Papaveraceae, native to Europe, north Africa, and southwest and central Asia. The species commonly occur in saline habitats, including coasts and salt pans.

List of species

• Glaucium afghanicum
• Glaucium arabicum
• Glaucium bracteatum
• Glaucium calycinum
• Glaucium caricum
• Glaucium corniculatum, Horned poppy (Sea poppy, Yellow horned poppy), native of Western Europe.
• Glaucium cuneatum
• Glaucium fischeri
• Glaucium flavum, Yellow horned poppy, native of Western Europe.
• Glaucium grandiflora, Horned poppy, native of western Mediterranean.
• Glaucium judaicum
• Glaucium leptopodum
• Glaucium luteum
• Glaucium persicum
• Glaucium phoenicum
• Glaucium pulchrum
• Glaucium refractum
• Glaucium squamigerum