Technical Abstract: The U.S. National Arboretum’s lilac breeding program was started in the 1970s by the late Don Egolf with the objectives of developing lilacs that were adapted to warmer climates, had good mildew tolerance, and had a showy fragrant floral display. Three new lilacs are described – ‘Betsy Ross’, ‘Old Glory’, and ‘Declaration’. ‘Betsy Ross’ was selected for its fragrant, pure white flowers and adaptation to warmer climates. It has a rounded habit with mature size of 10 feet tall by 13 feet wide. ‘Old Glory’ was selected for its abundant fragrant bluish-purple flowers, rounded growth habit, and disease tolerant foliage. It reaches a mature size of approximately 12 feet tall by 13 feet wide, and shows good field tolerance to bacterial pathogens in warmer climates where these organisms are a problem. ‘Declaration’ was selected for its large fragrant striking dark reddish-purple inflorescences and open upright growth habit. In Washington, DC, its mature size is 8.5 feet tall and 7 feet wide. It performs best in traditional cooler lilac-growing regions.