Catha
Catha edulis
Catha edulis (Vahl) Forssk. ex Endl.
Engl.: khat, Abyssinian tea, African tea, Arabian tea.
Deu.: Katstrauch.
Fran.: té de Arabia.
Suom.: khat.
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.