"Many people are under the misconception that the flower heads of the cultivated sunflower (Helianthus annuus) track the sun... Immature sunflower flower heads do exhibit solar tracking and on sunny days the buds will track the sun across the sky from east to west... However, as the flower bud matures and blossoms, the stem stiffens and the flower head becomes fixed facing the eastward direction." Hangarter, Roger P. «Solar tracking: sunflower plants». Plants-In-Motion website. Indiana University. Henta 22 August 2012.
«Mount Sunflower». Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Henta 21. desember 2008.