Comfrey

Springtime Comfrey

Comfrey in Bloom

Here are a couple links to info about comfrey and it's benefits.
http://www.botanical.com/botanical/mgmh/c/comfre92.html
http://www.horizonherbs.com/pilot.asp?pg=comfrey_root
http://www.botanical.com/botanical/mgmh/c/comfre92.html

Here is a video by LearningHerbs.com
It is less than 3 minutes and worth the look.
Right click on this link and open it in a new tab or new window for easy watching.
http://video.google.com/videosearch?q=comfrey&rls=com.microsoft:en-us&oe=UTF-8&um=1&ie=UTF-8&ei=0XdaSuzZMYWaMO-I7EI&sa=X&oi=video_result_group&ct=title&resnum=17#