Fig. 051-054. Vanilla.
Fig. 51. Bourbon Vanilla.
Fig. 52. Mexican Vanilla.
Fig. 53. Tahiti Vanilla.
Fig. 54. Wild Vanilla.
This image is from Vanilla in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.
A herbal distance course
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.