Glaucium flavum. Searching the internet for information on the Yellow Horned Poppy is an interesting exercise in differing perspectives. Some sources consider it a most wonderful ornamental plant for its large colorful flowers and ability to reseed itself year after year. Others consider it a noxious weed. All parts of the plant (including the seeds) are apparently toxic. It is banned in Massachusetts. Glaucium flavum is native to Europe, Northern Africa and Asia. It prefers to grow on shorelines and disturbed areas.














