Sunflower time in the Midwest

Helianthus annuus, has been in eastern North America for 5,000 years. Those gigantic leaves receive power (photosynthesis) from the sun. The sunflower often turns it’s head to follow the sun during the day.

As the name demonstrates, it is an annual plant (doesn’t come back next year). It is actually not a single flower but a cluster of flowers. Those things around the edge which are mistakenly thought of as petals are brightly colored, but sterile ‘Ray Flowers’. Sexual reproduction occurs in the disk. The central portion of the disk (called the inflorescence) is composed of many small perfect disk flowers. Each one has a stigma above the anthers and are pollinated individually by insects. If successfully pollinated the flower produces a fruit (the seed). Each disk could have hundreds, and sometimes thousands of seeds.

As the plant moves closer to maturity it is common for the ‘head’ to droop down.
Those Ray Flowers wither and fall off. The outer bracs turn a yellowish brown and fall off. And now, of course the birds have spotted it and predation begins. If you can harvest the seed for planting, a sunflower seed is viable for 6 years, so don’t throw those extra ones away.
Reckon I need to use this Master Gardner stuff for some good.

2 responses to “Sunflower time in the Midwest”

  1. Denise Flanders Avatar
    Denise Flanders

    Wow! Good shots! You can even see the ant!

    >

    Like

  2. Beautiful! My Sister was just up in the U.P.. We have kinfolk that are Yoopers….

    On Tue, Aug 24, 2021 at 11:26 AM deliriouslove1970. The life & times of Gary and Denise Flanders wrote:

    > Gary & Denise Flanders posted: ” Helianthus annuus, has been in eastern > North America for 5,000 years. Those gigantic leaves receive power > (photosynthesis) from the sun. The sunflower often turns it’s head to > follow the sun during the day. As the name demonstrates, it is an ann” >

    Like

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