Sunflower

The sunflower an annual plant is native to the Americas. The flower petals within the sunflower's cluster are always in a spiral pattern. Generally, each floret is oriented toward the next by appropximately the golden angle, 137.5 degrees, producing a pattern of interconnecting spirals, where the number of left spirals and the number of right spirals are successive Fibonacci numbers. This pattern produces the most efficient packing of seeds within the flower head.

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Filename: 20130415-9.jpg
Copyright: ©2013 Wayne Eastep
Image Size: 4256x2832 / 4.6MB; https://www.photoshelter.com/support/license; https://www.wayneeastep.com/contact; annuus 137 5 degrees Angiosperms Asterids Binomial name: Helianthus annuuys Eudicots Family: Asteraceae Fibonacci numbers Fine Art Florida Flower Genus: Helianthus Kingdom: Plantae Order: Asterales Sarasota Species: H Subfamily: Helianthoideae Tribe: Heiantheae bud composite flower florets flower bud flowering head golden angle inflorescence spiral pattern sunflower
Contained in galleries: Flowers, Nature Studies

The sunflower an annual plant is native to the Americas. The flower petals within the sunflower's cluster are always in a spiral pattern. Generally, each floret is oriented toward the next by appropximately the golden angle, 137.5 degrees, producing a pattern of interconnecting spirals, where the number of left spirals and the number of right spirals are successive Fibonacci numbers. This pattern produces the most efficient packing of seeds within the flower head.