The collection area includes much of the Asian continent. The majority of this collection comes from temperate climate and subtropical areas of China, Japan, Korea, Siberia, the Kamchatka Peninsula, and the Himalayas.
The topography within this area accommodates plants from incredibly diverse wild habitats. Sunny, relatively dry areas, contrast with damp, shaded places, which are often ten degrees cooler than the surrounding Garden. Temperate climate plants from across the Asian continent thrive here.
The Rhododendron collection is diverse, representing the many colors and growth forms of the genus, which includes azaleas. Other well-represented groups include the witch hazel family, maples, hydrangeas, and epimediums.
Dawn redwoods, Metasequoia glyptostroboides, once thought to be extinct for millions of years, were rediscovered in western China in 1944. The dawn redwoods in this collection were among the first grown outside of China.
Many favorite garden plants from Asia were introduced to Western horticulture by late 19th- and early 20th-century collecting expeditions. These include magnolias, rhododendrons, camellias, peonies, maples, and bamboos.
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