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Saturday, August 28, 2010

Common Sunflower-Helianthus annuus

You probably know this flower--the common sunflower (Helianthus annuus). It's native to the Americas and widespread. Flowers can be highly variable in this annual plant.

Young sunflowers display heliotropism--that is, they turn their heads to follow the sun throughout the day.

Sunflowers have been used to symbolize many things and have many uses, which are included in the link below.

I was delighted to see so many insects on the sunflowers, in particular this butterfly, a clouded sulphur (as best I can tell). With the yellowish tint, it's probably a male.
And the greener-tinged one is the female clouded sulphur. I saw thousands of sulphurs over an alfalfa field earlier in the summer, so it's neat to see what else they are feeding on.

For more info on common sunflower, click here.

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