Cunningham's Encyclopedia Magical Herbs
Expanded and revised, this comprehensive guide features magical uses of over 400 herbs and plants from all parts of the world. With over 400,000 copies in print, this reference book is a must for all who perform natural magic. It features illustrations for easy identification of every herb, in addition to common names, use, and rulership.
(Note: This is my most used Herbal Magick book. I always have this on hand and it's always perfect foe when you are creating your own magick!)