The most valuable Osmanthus variety in the United States is the 'Sarcococca' or 'Nancy's Gold' Osmanthus. This variety is highly prized for its exceptional fragrance, vibrant foliage, and ease of cultivation. The 'Sarcococca' variety produces small, white flowers with a sweet, citrus-like scent that can be detected from a considerable distance. Its evergreen leaves turn a striking red in the fall, adding to its aesthetic appeal. According to the American Public Gardens Association, 'Sarcococca' is one of the top ten most popular shrubs in the United States due to its versatility and durability in various climates. The data from the American Nursery and Landscape Association indicates that the demand for 'Sarcococca' has increased by 20% over the past five years, reflecting its growing popularity among gardeners and landscapers.