Ciclospermum
Ciclospermum leptophyllum
Ciclospermum leptophyllum (Pers.) Sprague.
Bot. syn.: Sium nodiflorum Walter.
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.