Pine Cones and Humidity
Name: Kari S.
How does humidity effect whether a pine cone is open or closed. We cannot
seem to be able to find any information on why they open or close due to the weather,
just that they do it. Can you explain this?
Some pine cones depend upon the temperatures associated with fire to open, while other
open seasonally. The following may be helpful:
Anthony Brach, Ph.D
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Update: June 2012