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256 pages, Hardcover
Published November 1, 2018
The morning glories much preferred to climb maize, and they really didn't like black, with the other colours somewhere in between. The researcher thought that the plants might be influenced by the total amount of light reflected by potential supports, or by the wavelengths of light reflected, but found no evidence for either hypothesis, and thus retreated, baffled. Morning glory obviously knows what it's doing, even if we don't know how it knows.
If you confuse a sunflower by rotating it through 180 at night, it carries on regardless, only re-coordinating with the sun after several days of facing the wrong way. It also doesn't look like the flower itself is all that important; if you decapitate a sunflower, the stump continues to turn. But leaves are necessary - remove them and movement stops.