The Sarah P. Duke Gardens consist of approximately 55 acres (22 ha) of landscaped and wooded areas at Duke University. There are 5 miles (8 km) of allées, walks, and pathways throughout the gardens. The gardens are divided into four areas, the Historic Core and Terraces, the H.L Blomquist Garden of Native Plants, the William Louis Culberson Asiatic Arboretum and the Doris Duke Center Gardens (including the Page-Rollins White Garden). The gardens are a memorial to Sarah Pearson Duke, mother of Mary Duke Biddle and wife of Benjamin N. Duke, one of Duke University's benefactors.