Admirers come to the U.S. National Arboretum's Azalea Collection every spring to witness one of Washington's premier spring attractions. Thousands of azaleas cover the flanks of Mount Hamilton in a blaze of color. The first warm days bring out the flowers, and the slopes take on a surreal, almost luminescent glow. Few shrubs have more impact on the spring landscape-azaleas are an enduring favorite in gardens throughout the country.
| Many of the shrubs in the collection sprang from the azalea breeding work of former Arboretum Director Benjamin Y. Morrison. 
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 | In 1952, the walled Morrison Garden was built. It still serves as the hub that unifies the Azalea Collection today. 
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 | 'Susannah' azalea 
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'Damask' azalea 
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 | The 'Ben Morrison' azalea is named after Former U.S. National Arboretum Director Benjamin Y. Morrison 
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 | 'Fawn' azalea 
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| 'Corydon' azalea 
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 | 'Ambrosia' azalea 
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 | Masses of azaleas grow on the steep slopes of Mount Hamilton. 
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| A network of rustic woodland trails follows the contours of Mount Hamilton and allows you to view the azalea blossoms at close range. 
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 | East view of the United States Capitol building from the top of Mount Hamilton. This is one of the highest points in the District of Columbia. 
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An old States Capitol building pillar resting on the top of Mount Hamilton. 
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| 'Delilah' azalea 
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 | 'Lullaby' azalea 
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'Coquette' azalea 
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