This variety of sunflower has more florets that make seeds and fewer that make petals.
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Sunflowers and petals
Credit: John Burke, UGA
The most common wild sunflower variety is shown in box A, and its florets are shown in B. Box C shows a double-flowered mutant variety, with its florets shown in D. Box E shows the tubular variety, with its florets shown in F. The arrows in box G indicate the double-flowered mutants depicted in van Gogh's Still Life: Vase with Fifteen Sunflowers.
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Field of sunflowers
Credit: image by Agricultural Research Service, public domain
When not being attacked by small children, immature sunflowers are able to orient themselves toward sunlight.
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How to Make Busy Bees Busier
Credit: Sarah Greenleaf
A wild bee (the bumble bee Bombus vosnesenskii) and a honey bee forage together on a sunflower. Honey bees that interact with wild, native bees are up to five times more efficient in pollinating sunflowers.