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Our field has been blooming now for about 5 days. People love to look at a
blooming sunflower field. A lot of people have been stopping to take pictures
and walk through the field. As you can see, there's a wide range of blooming
stages across the field. We'll be looking more closely at that
This plant is at the R5.5 stage, which as you probably remember R5 means it's blooming and the .5 means that 50 percent of the head has bloomed or is blooming. Let's look a little closer at this plant.
This is a cross-section of the R5.5 head. On the outer edges you see white columns with their floral parts above. These are flowers that have been pollinated and seeds are developing. In the center there are smaller columns, which are flowers that haven't bloomed yet, so they are unpollinated flowers. The base of the head is called the receptacle with its white, starchy, pithy area under the flowers.
Now, we're taking a closer look at about 6 rows of flowers on the outer edge that have been pollinated and you can see the seeds or botanically, achenes developing. To the left you see about 4 rows of flowers with their stigmas emerged and then the unpollinated flowers in the center of the inflorescence.
There's always one in a crowd, huh? This is an off-type plant. Why is this plant different from the others? Good question. Well, in the seed hybridization process there are plants used as the pollen source for plants from which seed is saved. Seed from the pollen-providing plants is not saved. However, sometimes a stray seed finds its way into the saved seed. This is the result.