Re: tissue origin on shelves/ledges under the beard

Donald Eaves raises the question about the origin of the "shelf" tissue upon which the beard rests, or from which the beard emerges--and its relation to the structure and color of the SA extension.
 
I wonder how we can determine the answer to this issue.  As Donald notes, spoons and flounces often match the fall color and pattern.  In some cases ( as in INKY ICON) the extension contrasts with the fall.
 
I'm guessing, on the basis of what has been observed, that the spoons and flounces arise from both the shelf structure *and* the fall petal tissues.  I would think this would be fairly constant from cv to cv, but that does not account for those that have contrasting colors.
 
What would we need to do to find out?
 
Neil Mogensen   z 7 western NC

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