The proper use of the key may be compared to the use of road signs
choice of two directions must be made at each intersection. One must
always chose the best route which matches the characteristics of the
tree. If at the end, the solution does not match the specimen, one can
identify a point in the process where the choice of direction was in
doubt. Many times the steps can be retraced to this point and the
can be identified.
Acknowledgements: Some of the pictures on these web pages are from Conservation Trees and Shrubs Pocket Guide, United States Department of Agriculture, Soil Conservation Service.
Wray, Department of Natural Resource and Ecology and Management,
Mark Vitosh, District Forester, Iowa DNR, and Jeff
Iles from the Horticulture Department provided
the content for these web pages. Tom Quinn was the programmer/designer.