Here are some interesting links to try.
Shopping for stuff...
To buy medicinal plants seeds, dried herbs, and lots of other stuff.
Where do I find info on...
Native American Ethnobotany Database put together by Dan Moerman
Henriette's Herbal Homepage - All kinds of stuff, I got some pictures from this site for mine, Thank You
Things of the spirit...
Herbs in the Bible
Education is the key...
Micheal Moores Southwest School of Botanical Medicine. Lots of info on plants here too! A wonderful resource!
Micheal Tierra's site, online courses and lots of other info.
Go see the plants, and smell the roses along the way...
Royal Botanic Gardens, Kew
The New York Botanical Garden
Brooklyn Botanic Garden
Missouri Botanical Garden
Closer to my home, Cornell Plantations
Various other Links.
Audubon Online Field Guides
Green Landscaping with Native Plants
OSU Online Plant Dictionary
The Plant Pathology Internet Guide Book