Most certain plant ID's?

[Aga Tentakulus]

To create a defensible list one should approach it the same way as with the castles with the dovetail battlements. Pretty sure they come from the same place.
Then there are about 170 classical medicinal plants where were used around 1400. These represent a second possibility of qualification.
Recipes and how often and for what they were used is another possibility.
A violet and castor bean meet these criteria and they look exactly the same.
The meadowsweet keeps it visually exactly the same. special feature the tubers in the root.

If I consider northern Italy as a possible place of origin, I will certainly find the plants in Italian medizinnischen manuscripts also.