Black-eyed Susan
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Scan day: 05 March 2014 UTC
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Description: Photographic study by Richard Haynes of this plant, Rudbeckia missouriensis, showing the stem and petals in all their intricate detail.
by Richard Haynes, Missouri USA Since childhood I have been intrigued by the marvelous color variety of flowering plants: why and how do so many colors occur? Why so few blue flowers and so many yellow? How do the flowers produce their colors and of what substances are they made? I had many questions but very few answers. [At this point I must say I'm not a trained botanist or even a decent gardener. (My wife has that attribute, thankfully.) I'm simply a retired chemist with botanical questions.]
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