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I want to know what species of Sunflower this is. It is growing in my garden in Boulder Colorado. It is approximately 8-10 feet high but it has at least 60 flowers or buds, and the flowers are approximately 6 inches in diameter so it is not a common sunflower.

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Denys Van Renen
Spotted by
Denys Van Renen

Boulder, Colorado, USA

Spotted on Aug 16, 2015
Submitted on Aug 16, 2015

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