Genus Romneya is a plant genus that belongs to the family Papaveraceae. It is commonly known as the Matilija poppy or the fried egg poppy because of its striking white petals with a yellow center, resembling a fried egg. Although its common name refers to Romneya, it has several synonyms. This plant is also known as the California tree poppy, Mount Diablo poppy, and the Matilija poppy. Despite its nickname "California tree poppy," this plant is not a tree but a perennial herbaceous plant. The Genus Romneya has been praised for its beautiful flowers and hardy nature, making it a favorite among gardeners and nature enthusiasts.