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Photo Credits
- 1. (c) Bob Gutowski, some rights reserved (CC BY-NC-SA)
- 2. (c) Charles Wohlers, some rights reserved (CC BY-NC-ND)
- 3. (c) JanetandPhil, some rights reserved (CC BY-NC-ND)
- 4. (c) Shihmei Barger 舒詩玫, some rights reserved (CC BY-NC-ND)
- 5. (c) Eric in SF, some rights reserved (CC BY-NC-ND)
- 6. (c) joe calhoun, some rights reserved (CC BY-SA)
- 7. (c) DM, some rights reserved (CC BY-ND)
- 8. (c) copepodo, some rights reserved (CC BY), uploaded by copepodo
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- 10. (c) Michael Rayner, some rights reserved (CC BY-NC), uploaded by Michael Rayner
- 11. (c) romana klee, some rights reserved (CC BY-SA)
- 12. (c) Steven J. Baskauf, some rights reserved (CC BY)
- 13. Wikimedia Commons, no known copyright restrictions (public domain)
- 14. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
- 15. (c) Shane Vaughn, some rights reserved (CC BY)
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- 17. (c) Petr Filippov, some rights reserved (CC BY-SA)
- 18. (c) Miroslav Deml, some rights reserved (CC BY)
- 19. (c) Bruce K. Kirchoff, some rights reserved (CC BY)
- 20. (c) "National Agricultural Library. Originally from US Forest Service. United States, VA.", some rights reserved (CC BY-NC-SA)
- 21. (c) Peter Gorman, some rights reserved (CC BY-NC-SA)
- 22. USDA NRCS PLANTS Database, no known copyright restrictions (public domain)
- 23. (c) PlantCollections, some rights reserved (CC BY-NC-SA)
- 24. (c) Katja Schulz, some rights reserved (CC BY-NC)
- 25. (c) Steven J. Baskauf, some rights reserved (CC BY-NC-SA)
- 26. (c) dogtooth77, some rights reserved (CC BY-NC-SA)
- 27. (c) Jenn Forman Orth, some rights reserved (CC BY-NC-SA)
- 28. (c) 2006 Luigi Rignanese, some rights reserved (CC BY-NC)