Achenes of sunflower (Helianthus annuus) develop from the inferior ovary of the disk flowers, which occupy the center of the inflorescence. These flowers are arranged helical in a Fibonacci series, e.g., a 21/55 phyllotaxis.
Achenes of sunflower (Helianthus annuus) develop from the inferior ovary of the disk flowers, which occupy the center of the inflorescence. These flowers are arranged helical in a Fibonacci series, e.g., a 21/55 phyllotaxis.