This is a short list of tools, articles and other resources on the web I found helpful. If you have links you think should be included in this list please let me know or leave in comments.
Local classes/workshops/walks
Jackie Dill of Oklahoma Wildcrafting offers annual walks corresponding to the seasons.
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Ozark Tracker Society offers regular workshops, classes and more. Check out their classes page.
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Links
10-Step Plan to improve plant id skills
Botany Everyday – plant talks/lectures, video and more from Mark Williams, using Thomas Elpel’s book, Botany in a Day. Definitely worth exploring.
Edible Wild Plant bibliography by Russ Cohen
Excellent list of book titles on foraging and wild edible plants.
Botany and Horticulture (Morphology)
Plant parts, structure and function
Horticultural Basics and Plant ID
Plant families from the author of Botany in a Day
Plant Morphology chart and terminology
• V Plant Glossary includes plates from Fourth Edition of Plants of the Chicago Region by Swink and Wilhelm (1994). Most excellent resource for leaf identification.
Trees
Tree Identification from Michigan State University
Excellent resource for tree huggers 
Tree ID at ArborDay.org
Dendrology at Virginia Tech
Everything about trees.
Additional Resources A smattering of books and video at Amazon for foraging and wildcrafting.
