noun
1. : an annual sunflower ( Helianthus petiolaris ) with rather slender usually branching stems that is common in the central United States
2. : showy sunflower
noun
1. : an annual sunflower ( Helianthus petiolaris ) with rather slender usually branching stems that is common in the central United States
2. : showy sunflower
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012