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How do oxeye daisies differ from Shasta daisies?

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Sunflower — Asteraceae The flowering head of a sunflower (*Helianthus annuus*) is formed of yellow, petal-like ray flowers and a brown center of minute disk flowers.

While both the oxeye daisy (Leucanthemum vulgare) and the Shasta daisy (L. ×superbum) belong to the Asteraceae family and share a similar appearance, they differ primarily in their origins and size.123

Origin: The oxeye daisy is a perennial plant native to Europe and Asia that has naturalized in other parts of the world, including the United States. In contrast, the Shasta daisy is a hybrid garden plant.123
Size: The most notable physical difference is the size of the flower heads. The oxeye daisy typically produces flower heads that are 2.5 to 5 cm (1 to 2 inches) in diameter. The Shasta daisy, however, is characterized by significantly larger flower heads that can reach up to 10 cm (4 inches) in diameter.12

Both plants feature the classic daisy structure, consisting of white ray flowers surrounding a central disk of yellow flowers.12