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Cottonwood Pollen

Cottonwood Pollen

A few weeks each summer, clumps of cottony-coated seeds are shed by several North American tree species belonging to the genus Populus that, as a result, are commonly known as cottonwoods. The trees are dioecious, and only females shed the familiar white fluff, which softly floats through the air for dispersal to new locales.

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