Nineteen courts are used at Wimbledon, and since 2001 they have all been sown with 100% Perennial Ryegrass, a grass native to Europe, Asia and northern Africa.
Lolium multiflorum, known as "annual ryegrass" in the United States, Canada and the United Kingdom and grown as a cover crop
In the mid-19th century, particularly during the California Gold Rush, travelers along the Humboldt would graze their cattle on the wild ryegrass in the area near present-day Rye Patch Reservoir, which was known as Lassen Meadows.