Rehmannia glutinosa (Gaertn.) Libosch. ex Fisch. & C. A. Mey.Engl.: Chinese foxglove, rehmannia.
Deu.: Chinafingerhut, Klebriger Chinafingerhut.
TCM: di huang.
Bot. syn.: Digitalis glutinosa Gaertn., Rehmannia chinensis (Buchh.)Libosch. ex Fisch. & C. A. Mey., Rehmannia chinensis Libosch. ex Fisch. & C. A. Mey.
I have no articles for this botanical term, but there might be some for the next level down (if found).
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.