plant classification

Go to the following sites and look at the leaf classification section.
http://www2.bgfl.org/bgfl2/custom/resources_ftp/client_ftp/ks2/science/plants_pt2/plants2/plant_identification.htm
http://www.abtreegene.com/trees.html
http://members.shaw.ca/aelf/tree_types.htm

http://www.forestshop.com/trees_regional.html
Here is another site for identifying trees in Canada.

http://www.treecanada.ca/site/?page=programs_trees&lang=en


How to measure the height of a tree:
http://www.wikihow.com/Measure-the-Height-of-a-Tree