Ostrea
Ostrea
Ostrea L.
Engl.: oyster.
Deu.: Austern.
Ostrea edulis
Ostrea edulis L.
Engl.: edible oyster.
Ostrea virginiana:
Ostrea virginiana Lister, Ostreidae: See Crassostrea virginica Gmelin.
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.