The Plant Selector is a powerful resource which categorizes approximately 600 woody trees, shrubs and vines according to over 20 traits which you select on the search form.

The Plant Selector allows you to search the University of Connecticut Plant Database to find trees, shrubs and vines which meet your needs. Enter information on the form below to create your search and then click the submit button. You do not need to complete all the categories, fill in as many as you want by entering text, choosing from a menu or checking an option.
http://www.hort.uconn.edu/Plants/index.html