Periodicity
wilmack's maple tree
angular light bends
down the canyon sides
washing greenness from
maple and alder leaves
phytochrome measures
shorter days—longer nights
auxins and gibberellins wane
as senescence sets in
lovely anthocyanins
and blazing carotenoids
pigments cycling with
leafy periodicity
Pamela Olson
Dedicated to my botany
professor at Univ. of Wash.
For the prompt: Autumn
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