Edited by Minnesota Scientific and Natural Areas, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Jason Hollinger, some rights reserved (CC BY)
- 2. (c) manual crank, some rights reserved (CC BY-NC-SA)
- 3. (c) Rob Routledge, some rights reserved (CC BY-NC), uploaded by Rob Routledge
- 4. (c) thesnaguy, some rights reserved (CC BY-NC-SA), uploaded by thesnaguy
- 5. (c) Brett Whaley, some rights reserved (CC BY-NC)
- 6. (c) botany08, some rights reserved (CC BY), uploaded by botany08
- 7. (c) Timothy Valentine, some rights reserved (CC BY-NC-SA)
- 8. (c) Anthony Mendoza, some rights reserved (CC BY-NC-SA)
- 9. (c) Anita, some rights reserved (CC BY-NC)
- 10. (c) Fabelfroh, some rights reserved (CC BY-SA)
- 11. (c) judith holm, some rights reserved (CC BY-NC-ND), uploaded by judith holm
- 12. (c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott
- 13. (c) Petritap, some rights reserved (CC BY-SA)
- 14. (c) JanetandPhil, some rights reserved (CC BY-NC-ND)
- 15. (c) Jason Hollinger, some rights reserved (CC BY-SA)