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MLSNF-Douglas Fir Cone Dissections
Douglas-fir cones are dissected to determine their quality and monitor their state of ripening. These cones show signs of insect damage. USDA Forest Service photo by Lindsey Winkel.

Original public domain image from Flickr

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Public DomainFree CCO U.S. Government image for Personal and Business use

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MLSNF-Douglas Fir Cone Dissections
Douglas-fir cones are dissected to determine their quality and monitor their state of ripening. These cones show signs of insect damage. USDA Forest Service photo by Lindsey Winkel.

More