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Earthwatch Institute's Urban Tree Project: Cambridge, MA, USA

Green Ash 1
Fraxinus pennsylvanica
White Ash 2
Fraxinus americana

Edited by Marie Studer, some rights reserved (CC BY-SA)

Photo Credits

  • 1. (c) Matt Lavin, some rights reserved (CC BY-SA)
  • 2. (c) Ross, some rights reserved (CC BY-NC-SA)

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