Click here for information about Cassia.
Classic texts: Sayre 1917: the pics.
Old texts: Hayne's Getreue Darstellung, vol. 9, 1825: the images.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.