Mandan Sunflower (Helianthus annus). 

Michael Fuller

Mandan Sunflower head starting to dry on stem. 28 July 2021.

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Mandan Sunflower head with a large bee photographed on 1 July 2021 by Amira Fuller. 

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Mandan Sunflower. USDA-ARS-GRIN PI 600719. Sprouted seed on 29 May 2021. 

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Seed measurements (Length x Width x Thickness) for PI 600719:

11.23 x 7.28 x 4.37,      13.18 x 8.54 x 5.17,

 9.99 x 8.54 x 5.17,       11.89 x 7.74 x 4.87,

10.46 x 7.18 x 4.44,      11.22 x 8.10 x 4.85,

10.75 x 7.52 x 5.03,      10.31 x 6.43 x 3.94,

11.46 x 7.09 x 4.26,      10.60 x 7.44 x 4.29