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Helianthus subcanescens is a North American species of sunflower. It is native to the Upper Midwest of the United States and Manitoba, Canada. While originally classified as a variety of Helianthus tuberosus by Asa Gray, in 1929 Elba Emanuel Watson reclassified it as a separate species.

Helianthus subcanescens is a perennial and its leaves are alternate and entire. From August to October, it produces inflorescences of yellow, star-shaped flowers.